20171978216

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{733}}^2$

素因数の和:1523

約数の個数: 72

約数和(自身を含む): 43047220230

約数和(自身を除く): 22875242014

約数列:

[1, 2, 4, 8, 13, 19, 26, 38, 52, 76, 104, 152, 247, 361, 494, 722, 733, 988, 1444, 1466, 1976, 2888, 2932, 4693, 5864, 9386, 9529, 13927, 18772, 19058, 27854, 37544, 38116, 55708, 76232, 111416, 181051, 264613, 362102, 529226, 537289, 724204, 1058452, 1074578, 1448408, 2116904, 2149156, 3439969, 4298312, 6879938, 6984757, 10208491, 13759876, 13969514, 20416982, 27519752, 27939028, 40833964, 55878056, 81667928, 132710383, 193961329, 265420766, 387922658, 530841532, 775845316, 1061683064, 1551690632, 2521497277, 5042994554, 10085989108, 20171978216]

約数ペア:

[(1, 20171978216), (2, 10085989108), (4, 5042994554), (8, 2521497277), (13, 1551690632), (19, 1061683064), (26, 775845316), (38, 530841532), (52, 387922658), (76, 265420766), (104, 193961329), (152, 132710383), (247, 81667928), (361, 55878056), (494, 40833964), (722, 27939028), (733, 27519752), (988, 20416982), (1444, 13969514), (1466, 13759876), (1976, 10208491), (2888, 6984757), (2932, 6879938), (4693, 4298312), (5864, 3439969), (9386, 2149156), (9529, 2116904), (13927, 1448408), (18772, 1074578), (19058, 1058452), (27854, 724204), (37544, 537289), (38116, 529226), (55708, 362102), (76232, 264613), (111416, 181051)]