21131864

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{3331}}^1$

素因数の和:3411

約数の個数: 32

約数和(自身を含む): 43382640

約数和(自身を除く): 22250776

約数列:

[1, 2, 4, 8, 13, 26, 52, 61, 104, 122, 244, 488, 793, 1586, 3172, 3331, 6344, 6662, 13324, 26648, 43303, 86606, 173212, 203191, 346424, 406382, 812764, 1625528, 2641483, 5282966, 10565932, 21131864]

約数ペア:

[(1, 21131864), (2, 10565932), (4, 5282966), (8, 2641483), (13, 1625528), (26, 812764), (52, 406382), (61, 346424), (104, 203191), (122, 173212), (244, 86606), (488, 43303), (793, 26648), (1586, 13324), (3172, 6662), (3331, 6344)]