216802405

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{21059}}^1$

素因数の和:21164

約数の個数: 16

約数和(自身を含む): 272937600

約数和(自身を除く): 56135195

約数列:

[1, 5, 29, 71, 145, 355, 2059, 10295, 21059, 105295, 610711, 1495189, 3053555, 7475945, 43360481, 216802405]

約数ペア:

[(1, 216802405), (5, 43360481), (29, 7475945), (71, 3053555), (145, 1495189), (355, 610711), (2059, 105295), (10295, 21059)]