21409336

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{1481}}^1$

素因数の和:1639

約数の個数: 32

約数和(自身を含む): 43570800

約数和(自身を除く): 22161464

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 139, 278, 556, 1112, 1481, 1807, 2962, 3614, 5924, 7228, 11848, 14456, 19253, 38506, 77012, 154024, 205859, 411718, 823436, 1646872, 2676167, 5352334, 10704668, 21409336]

約数ペア:

[(1, 21409336), (2, 10704668), (4, 5352334), (8, 2676167), (13, 1646872), (26, 823436), (52, 411718), (104, 205859), (139, 154024), (278, 77012), (556, 38506), (1112, 19253), (1481, 14456), (1807, 11848), (2962, 7228), (3614, 5924)]