20727800

素因数分解:

$2^3\times 5^2\times {\mathrm{61}}^1\times {\mathrm{1699}}^1$

素因数の和:1776

約数の個数: 48

約数和(自身を含む): 49011000

約数和(自身を除く): 28283200

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 61, 100, 122, 200, 244, 305, 488, 610, 1220, 1525, 1699, 2440, 3050, 3398, 6100, 6796, 8495, 12200, 13592, 16990, 33980, 42475, 67960, 84950, 103639, 169900, 207278, 339800, 414556, 518195, 829112, 1036390, 2072780, 2590975, 4145560, 5181950, 10363900, 20727800]

約数ペア:

[(1, 20727800), (2, 10363900), (4, 5181950), (5, 4145560), (8, 2590975), (10, 2072780), (20, 1036390), (25, 829112), (40, 518195), (50, 414556), (61, 339800), (100, 207278), (122, 169900), (200, 103639), (244, 84950), (305, 67960), (488, 42475), (610, 33980), (1220, 16990), (1525, 13592), (1699, 12200), (2440, 8495), (3050, 6796), (3398, 6100)]