21890825

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{3461}}^1$

素因数の和:3505

約数の個数: 24

約数和(自身を含む): 30908736

約数和(自身を除く): 9017911

約数列:

[1, 5, 11, 23, 25, 55, 115, 253, 275, 575, 1265, 3461, 6325, 17305, 38071, 79603, 86525, 190355, 398015, 875633, 951775, 1990075, 4378165, 21890825]

約数ペア:

[(1, 21890825), (5, 4378165), (11, 1990075), (23, 951775), (25, 875633), (55, 398015), (115, 190355), (253, 86525), (275, 79603), (575, 38071), (1265, 17305), (3461, 6325)]