21372405

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{61949}}^1$

素因数の和:61980

約数の個数: 16

約数和(自身を含む): 35683200

約数和(自身を除く): 14310795

約数列:

[1, 3, 5, 15, 23, 69, 115, 345, 61949, 185847, 309745, 929235, 1424827, 4274481, 7124135, 21372405]

約数ペア:

[(1, 21372405), (3, 7124135), (5, 4274481), (15, 1424827), (23, 929235), (69, 309745), (115, 185847), (345, 61949)]