21005050

素因数分解:

$2^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{181}}^1\times {\mathrm{211}}^1$

素因数の和:415

約数の個数: 48

約数和(自身を含む): 43059744

約数和(自身を除く): 22054694

約数列:

[1, 2, 5, 10, 11, 22, 25, 50, 55, 110, 181, 211, 275, 362, 422, 550, 905, 1055, 1810, 1991, 2110, 2321, 3982, 4525, 4642, 5275, 9050, 9955, 10550, 11605, 19910, 23210, 38191, 49775, 58025, 76382, 99550, 116050, 190955, 381910, 420101, 840202, 954775, 1909550, 2100505, 4201010, 10502525, 21005050]

約数ペア:

[(1, 21005050), (2, 10502525), (5, 4201010), (10, 2100505), (11, 1909550), (22, 954775), (25, 840202), (50, 420101), (55, 381910), (110, 190955), (181, 116050), (211, 99550), (275, 76382), (362, 58025), (422, 49775), (550, 38191), (905, 23210), (1055, 19910), (1810, 11605), (1991, 10550), (2110, 9955), (2321, 9050), (3982, 5275), (4525, 4642)]