21878010

素因数分解:

$2^1\times 3^2\times 5^1\times 7^2\times {\mathrm{11}}^2\times {\mathrm{41}}^1$

素因数の和:90

約数の個数: 216

約数和(自身を含む): 74506068

約数和(自身を除く): 52628058

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 11, 14, 15, 18, 21, 22, 30, 33, 35, 41, 42, 45, 49, 55, 63, 66, 70, 77, 82, 90, 98, 99, 105, 110, 121, 123, 126, 147, 154, 165, 198, 205, 210, 231, 242, 245, 246, 287, 294, 315, 330, 363, 369, 385, 410, 441, 451, 462, 490, 495, 539, 574, 605, 615, 630, 693, 726, 735, 738, 770, 847, 861, 882, 902, 990, 1078, 1089, 1155, 1210, 1230, 1353, 1386, 1435, 1470, 1617, 1694, 1722, 1815, 1845, 2009, 2178, 2205, 2255, 2310, 2541, 2583, 2695, 2706, 2870, 3157, 3234, 3465, 3630, 3690, 4018, 4059, 4235, 4305, 4410, 4510, 4851, 4961, 5082, 5166, 5390, 5445, 5929, 6027, 6314, 6765, 6930, 7623, 8085, 8118, 8470, 8610, 9471, 9702, 9922, 10045, 10890, 11858, 12054, 12705, 12915, 13530, 14883, 15246, 15785, 16170, 17787, 18081, 18942, 20090, 20295, 22099, 24255, 24805, 25410, 25830, 28413, 29645, 29766, 30135, 31570, 34727, 35574, 36162, 38115, 40590, 44198, 44649, 47355, 48510, 49610, 53361, 56826, 59290, 60270, 66297, 69454, 74415, 76230, 88935, 89298, 90405, 94710, 104181, 106722, 110495, 132594, 142065, 148830, 173635, 177870, 180810, 198891, 208362, 220990, 223245, 243089, 266805, 284130, 312543, 331485, 347270, 397782, 446490, 486178, 520905, 533610, 625086, 662970, 729267, 994455, 1041810, 1215445, 1458534, 1562715, 1988910, 2187801, 2430890, 3125430, 3646335, 4375602, 7292670, 10939005, 21878010]

約数ペア:

[(1, 21878010), (2, 10939005), (3, 7292670), (5, 4375602), (6, 3646335), (7, 3125430), (9, 2430890), (10, 2187801), (11, 1988910), (14, 1562715), (15, 1458534), (18, 1215445), (21, 1041810), (22, 994455), (30, 729267), (33, 662970), (35, 625086), (41, 533610), (42, 520905), (45, 486178), (49, 446490), (55, 397782), (63, 347270), (66, 331485), (70, 312543), (77, 284130), (82, 266805), (90, 243089), (98, 223245), (99, 220990), (105, 208362), (110, 198891), (121, 180810), (123, 177870), (126, 173635), (147, 148830), (154, 142065), (165, 132594), (198, 110495), (205, 106722), (210, 104181), (231, 94710), (242, 90405), (245, 89298), (246, 88935), (287, 76230), (294, 74415), (315, 69454), (330, 66297), (363, 60270), (369, 59290), (385, 56826), (410, 53361), (441, 49610), (451, 48510), (462, 47355), (490, 44649), (495, 44198), (539, 40590), (574, 38115), (605, 36162), (615, 35574), (630, 34727), (693, 31570), (726, 30135), (735, 29766), (738, 29645), (770, 28413), (847, 25830), (861, 25410), (882, 24805), (902, 24255), (990, 22099), (1078, 20295), (1089, 20090), (1155, 18942), (1210, 18081), (1230, 17787), (1353, 16170), (1386, 15785), (1435, 15246), (1470, 14883), (1617, 13530), (1694, 12915), (1722, 12705), (1815, 12054), (1845, 11858), (2009, 10890), (2178, 10045), (2205, 9922), (2255, 9702), (2310, 9471), (2541, 8610), (2583, 8470), (2695, 8118), (2706, 8085), (2870, 7623), (3157, 6930), (3234, 6765), (3465, 6314), (3630, 6027), (3690, 5929), (4018, 5445), (4059, 5390), (4235, 5166), (4305, 5082), (4410, 4961), (4510, 4851)]