16720405

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{4217}}^1$

素因数の和:4296

約数の個数: 16

約数和(自身を含む): 21967344

約数和(自身を除く): 5246939

約数列:

[1, 5, 13, 61, 65, 305, 793, 3965, 4217, 21085, 54821, 257237, 274105, 1286185, 3344081, 16720405]

約数ペア:

[(1, 16720405), (5, 3344081), (13, 1286185), (61, 274105), (65, 257237), (305, 54821), (793, 21085), (3965, 4217)]