21708560

素因数分解:

$2^4\times 5^1\times {\mathrm{271357}}^1$

素因数の和:271370

約数の個数: 20

約数和(自身を含む): 50472588

約数和(自身を除く): 28764028

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 271357, 542714, 1085428, 1356785, 2170856, 2713570, 4341712, 5427140, 10854280, 21708560]

約数ペア:

[(1, 21708560), (2, 10854280), (4, 5427140), (5, 4341712), (8, 2713570), (10, 2170856), (16, 1356785), (20, 1085428), (40, 542714), (80, 271357)]