20990970

素因数分解:

$2^1\times 3^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{233}}^1$

素因数の和:277

約数の個数: 192

約数和(自身を含む): 73592064

約数和(自身を除く): 52601094

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 11, 13, 14, 15, 18, 21, 22, 26, 30, 33, 35, 39, 42, 45, 55, 63, 65, 66, 70, 77, 78, 90, 91, 99, 105, 110, 117, 126, 130, 143, 154, 165, 182, 195, 198, 210, 231, 233, 234, 273, 286, 315, 330, 385, 390, 429, 455, 462, 466, 495, 546, 585, 630, 693, 699, 715, 770, 819, 858, 910, 990, 1001, 1155, 1165, 1170, 1287, 1365, 1386, 1398, 1430, 1631, 1638, 2002, 2097, 2145, 2310, 2330, 2563, 2574, 2730, 3003, 3029, 3262, 3465, 3495, 4095, 4194, 4290, 4893, 5005, 5126, 6006, 6058, 6435, 6930, 6990, 7689, 8155, 8190, 9009, 9087, 9786, 10010, 10485, 12815, 12870, 14679, 15015, 15145, 15378, 16310, 17941, 18018, 18174, 20970, 21203, 23067, 24465, 25630, 27261, 29358, 30030, 30290, 33319, 35882, 38445, 42406, 45045, 45435, 46134, 48930, 53823, 54522, 63609, 66638, 73395, 76890, 89705, 90090, 90870, 99957, 106015, 107646, 115335, 127218, 136305, 146790, 161469, 166595, 179410, 190827, 199914, 212030, 230670, 233233, 269115, 272610, 299871, 318045, 322938, 333190, 381654, 466466, 499785, 538230, 599742, 636090, 699699, 807345, 954135, 999570, 1166165, 1399398, 1499355, 1614690, 1908270, 2099097, 2332330, 2998710, 3498495, 4198194, 6996990, 10495485, 20990970]

約数ペア:

[(1, 20990970), (2, 10495485), (3, 6996990), (5, 4198194), (6, 3498495), (7, 2998710), (9, 2332330), (10, 2099097), (11, 1908270), (13, 1614690), (14, 1499355), (15, 1399398), (18, 1166165), (21, 999570), (22, 954135), (26, 807345), (30, 699699), (33, 636090), (35, 599742), (39, 538230), (42, 499785), (45, 466466), (55, 381654), (63, 333190), (65, 322938), (66, 318045), (70, 299871), (77, 272610), (78, 269115), (90, 233233), (91, 230670), (99, 212030), (105, 199914), (110, 190827), (117, 179410), (126, 166595), (130, 161469), (143, 146790), (154, 136305), (165, 127218), (182, 115335), (195, 107646), (198, 106015), (210, 99957), (231, 90870), (233, 90090), (234, 89705), (273, 76890), (286, 73395), (315, 66638), (330, 63609), (385, 54522), (390, 53823), (429, 48930), (455, 46134), (462, 45435), (466, 45045), (495, 42406), (546, 38445), (585, 35882), (630, 33319), (693, 30290), (699, 30030), (715, 29358), (770, 27261), (819, 25630), (858, 24465), (910, 23067), (990, 21203), (1001, 20970), (1155, 18174), (1165, 18018), (1170, 17941), (1287, 16310), (1365, 15378), (1386, 15145), (1398, 15015), (1430, 14679), (1631, 12870), (1638, 12815), (2002, 10485), (2097, 10010), (2145, 9786), (2310, 9087), (2330, 9009), (2563, 8190), (2574, 8155), (2730, 7689), (3003, 6990), (3029, 6930), (3262, 6435), (3465, 6058), (3495, 6006), (4095, 5126), (4194, 5005), (4290, 4893)]