20591800

素因数分解:

$2^3\times 5^2\times {\mathrm{149}}^1\times {\mathrm{691}}^1$

素因数の和:856

約数の個数: 48

約数和(自身を含む): 48267000

約数和(自身を除く): 27675200

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 149, 200, 298, 596, 691, 745, 1192, 1382, 1490, 2764, 2980, 3455, 3725, 5528, 5960, 6910, 7450, 13820, 14900, 17275, 27640, 29800, 34550, 69100, 102959, 138200, 205918, 411836, 514795, 823672, 1029590, 2059180, 2573975, 4118360, 5147950, 10295900, 20591800]

約数ペア:

[(1, 20591800), (2, 10295900), (4, 5147950), (5, 4118360), (8, 2573975), (10, 2059180), (20, 1029590), (25, 823672), (40, 514795), (50, 411836), (100, 205918), (149, 138200), (200, 102959), (298, 69100), (596, 34550), (691, 29800), (745, 27640), (1192, 17275), (1382, 14900), (1490, 13820), (2764, 7450), (2980, 6910), (3455, 5960), (3725, 5528)]