20108745

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{811}}^1$

素因数の和:870

約数の個数: 48

約数和(自身を含む): 38001600

約数和(自身を除く): 17892855

約数列:

[1, 3, 5, 9, 15, 19, 29, 45, 57, 87, 95, 145, 171, 261, 285, 435, 551, 811, 855, 1305, 1653, 2433, 2755, 4055, 4959, 7299, 8265, 12165, 15409, 23519, 24795, 36495, 46227, 70557, 77045, 117595, 138681, 211671, 231135, 352785, 446861, 693405, 1058355, 1340583, 2234305, 4021749, 6702915, 20108745]

約数ペア:

[(1, 20108745), (3, 6702915), (5, 4021749), (9, 2234305), (15, 1340583), (19, 1058355), (29, 693405), (45, 446861), (57, 352785), (87, 231135), (95, 211671), (145, 138681), (171, 117595), (261, 77045), (285, 70557), (435, 46227), (551, 36495), (811, 24795), (855, 23519), (1305, 15409), (1653, 12165), (2433, 8265), (2755, 7299), (4055, 4959)]