19988985

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{137}}^2$

素因数の和:353

約数の個数: 24

約数和(自身を含む): 32671296

約数和(自身を除く): 12682311

約数列:

[1, 3, 5, 15, 71, 137, 213, 355, 411, 685, 1065, 2055, 9727, 18769, 29181, 48635, 56307, 93845, 145905, 281535, 1332599, 3997797, 6662995, 19988985]

約数ペア:

[(1, 19988985), (3, 6662995), (5, 3997797), (15, 1332599), (71, 281535), (137, 145905), (213, 93845), (355, 56307), (411, 48635), (685, 29181), (1065, 18769), (2055, 9727)]