21546405

素因数分解:

$3^4\times 5^1\times {\mathrm{53201}}^1$

素因数の和:53218

約数の個数: 20

約数和(自身を含む): 38624652

約数和(自身を除く): 17078247

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 53201, 159603, 266005, 478809, 798015, 1436427, 2394045, 4309281, 7182135, 21546405]

約数ペア:

[(1, 21546405), (3, 7182135), (5, 4309281), (9, 2394045), (15, 1436427), (27, 798015), (45, 478809), (81, 266005), (135, 159603), (405, 53201)]