21891428

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{2137}}^1$

素因数の和:2351

約数の個数: 24

約数和(自身を含む): 41485752

約数和(自身を除く): 19594324

約数列:

[1, 2, 4, 13, 26, 52, 197, 394, 788, 2137, 2561, 4274, 5122, 8548, 10244, 27781, 55562, 111124, 420989, 841978, 1683956, 5472857, 10945714, 21891428]

約数ペア:

[(1, 21891428), (2, 10945714), (4, 5472857), (13, 1683956), (26, 841978), (52, 420989), (197, 111124), (394, 55562), (788, 27781), (2137, 10244), (2561, 8548), (4274, 5122)]