20406540

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{631}}^1$

素因数の和:668

約数の個数: 144

約数和(自身を含む): 72624384

約数和(自身を除く): 52217844

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 11, 12, 14, 15, 20, 21, 22, 28, 30, 33, 35, 42, 44, 49, 55, 60, 66, 70, 77, 84, 98, 105, 110, 132, 140, 147, 154, 165, 196, 210, 220, 231, 245, 294, 308, 330, 385, 420, 462, 490, 539, 588, 631, 660, 735, 770, 924, 980, 1078, 1155, 1262, 1470, 1540, 1617, 1893, 2156, 2310, 2524, 2695, 2940, 3155, 3234, 3786, 4417, 4620, 5390, 6310, 6468, 6941, 7572, 8085, 8834, 9465, 10780, 12620, 13251, 13882, 16170, 17668, 18930, 20823, 22085, 26502, 27764, 30919, 32340, 34705, 37860, 41646, 44170, 48587, 53004, 61838, 66255, 69410, 83292, 88340, 92757, 97174, 104115, 123676, 132510, 138820, 145761, 154595, 185514, 194348, 208230, 242935, 265020, 291522, 309190, 340109, 371028, 416460, 463785, 485870, 583044, 618380, 680218, 728805, 927570, 971740, 1020327, 1360436, 1457610, 1700545, 1855140, 2040654, 2915220, 3401090, 4081308, 5101635, 6802180, 10203270, 20406540]

約数ペア:

[(1, 20406540), (2, 10203270), (3, 6802180), (4, 5101635), (5, 4081308), (6, 3401090), (7, 2915220), (10, 2040654), (11, 1855140), (12, 1700545), (14, 1457610), (15, 1360436), (20, 1020327), (21, 971740), (22, 927570), (28, 728805), (30, 680218), (33, 618380), (35, 583044), (42, 485870), (44, 463785), (49, 416460), (55, 371028), (60, 340109), (66, 309190), (70, 291522), (77, 265020), (84, 242935), (98, 208230), (105, 194348), (110, 185514), (132, 154595), (140, 145761), (147, 138820), (154, 132510), (165, 123676), (196, 104115), (210, 97174), (220, 92757), (231, 88340), (245, 83292), (294, 69410), (308, 66255), (330, 61838), (385, 53004), (420, 48587), (462, 44170), (490, 41646), (539, 37860), (588, 34705), (631, 32340), (660, 30919), (735, 27764), (770, 26502), (924, 22085), (980, 20823), (1078, 18930), (1155, 17668), (1262, 16170), (1470, 13882), (1540, 13251), (1617, 12620), (1893, 10780), (2156, 9465), (2310, 8834), (2524, 8085), (2695, 7572), (2940, 6941), (3155, 6468), (3234, 6310), (3786, 5390), (4417, 4620)]