21310705

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{8861}}^1$

素因数の和:8916

約数の個数: 16

約数和(自身を含む): 28287504

約数和(自身を除く): 6976799

約数列:

[1, 5, 13, 37, 65, 185, 481, 2405, 8861, 44305, 115193, 327857, 575965, 1639285, 4262141, 21310705]

約数ペア:

[(1, 21310705), (5, 4262141), (13, 1639285), (37, 575965), (65, 327857), (185, 115193), (481, 44305), (2405, 8861)]