20783500

素因数分解:

$2^2\times 5^3\times {\mathrm{197}}^1\times {\mathrm{211}}^1$

素因数の和:427

約数の個数: 48

約数和(自身を含む): 45837792

約数和(自身を除く): 25054292

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 197, 211, 250, 394, 422, 500, 788, 844, 985, 1055, 1970, 2110, 3940, 4220, 4925, 5275, 9850, 10550, 19700, 21100, 24625, 26375, 41567, 49250, 52750, 83134, 98500, 105500, 166268, 207835, 415670, 831340, 1039175, 2078350, 4156700, 5195875, 10391750, 20783500]

約数ペア:

[(1, 20783500), (2, 10391750), (4, 5195875), (5, 4156700), (10, 2078350), (20, 1039175), (25, 831340), (50, 415670), (100, 207835), (125, 166268), (197, 105500), (211, 98500), (250, 83134), (394, 52750), (422, 49250), (500, 41567), (788, 26375), (844, 24625), (985, 21100), (1055, 19700), (1970, 10550), (2110, 9850), (3940, 5275), (4220, 4925)]