20557900

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^2\times {\mathrm{1699}}^1$

素因数の和:1735

約数の個数: 54

約数和(自身を含む): 49063700

約数和(自身を除く): 28505800

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 100, 110, 121, 220, 242, 275, 484, 550, 605, 1100, 1210, 1699, 2420, 3025, 3398, 6050, 6796, 8495, 12100, 16990, 18689, 33980, 37378, 42475, 74756, 84950, 93445, 169900, 186890, 205579, 373780, 411158, 467225, 822316, 934450, 1027895, 1868900, 2055790, 4111580, 5139475, 10278950, 20557900]

約数ペア:

[(1, 20557900), (2, 10278950), (4, 5139475), (5, 4111580), (10, 2055790), (11, 1868900), (20, 1027895), (22, 934450), (25, 822316), (44, 467225), (50, 411158), (55, 373780), (100, 205579), (110, 186890), (121, 169900), (220, 93445), (242, 84950), (275, 74756), (484, 42475), (550, 37378), (605, 33980), (1100, 18689), (1210, 16990), (1699, 12100), (2420, 8495), (3025, 6796), (3398, 6050)]