21711920

素因数分解:

$2^4\times 5^1\times {\mathrm{127}}^1\times {\mathrm{2137}}^1$

素因数の和:2277

約数の個数: 40

約数和(自身を含む): 50901504

約数和(自身を除く): 29189584

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 127, 254, 508, 635, 1016, 1270, 2032, 2137, 2540, 4274, 5080, 8548, 10160, 10685, 17096, 21370, 34192, 42740, 85480, 170960, 271399, 542798, 1085596, 1356995, 2171192, 2713990, 4342384, 5427980, 10855960, 21711920]

約数ペア:

[(1, 21711920), (2, 10855960), (4, 5427980), (5, 4342384), (8, 2713990), (10, 2171192), (16, 1356995), (20, 1085596), (40, 542798), (80, 271399), (127, 170960), (254, 85480), (508, 42740), (635, 34192), (1016, 21370), (1270, 17096), (2032, 10685), (2137, 10160), (2540, 8548), (4274, 5080)]