21588820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^3\times {\mathrm{811}}^1$

素因数の和:853

約数の個数: 48

約数和(自身を含む): 49928256

約数和(自身を除く): 28339436

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 811, 1210, 1331, 1622, 2420, 2662, 3244, 4055, 5324, 6655, 8110, 8921, 13310, 16220, 17842, 26620, 35684, 44605, 89210, 98131, 178420, 196262, 392524, 490655, 981310, 1079441, 1962620, 2158882, 4317764, 5397205, 10794410, 21588820]

約数ペア:

[(1, 21588820), (2, 10794410), (4, 5397205), (5, 4317764), (10, 2158882), (11, 1962620), (20, 1079441), (22, 981310), (44, 490655), (55, 392524), (110, 196262), (121, 178420), (220, 98131), (242, 89210), (484, 44605), (605, 35684), (811, 26620), (1210, 17842), (1331, 16220), (1622, 13310), (2420, 8921), (2662, 8110), (3244, 6655), (4055, 5324)]