21690985

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{227}}^1\times {\mathrm{659}}^1$

素因数の和:920

約数の個数: 16

約数和(自身を含む): 27086400

約数和(自身を除く): 5395415

約数列:

[1, 5, 29, 145, 227, 659, 1135, 3295, 6583, 19111, 32915, 95555, 149593, 747965, 4338197, 21690985]

約数ペア:

[(1, 21690985), (5, 4338197), (29, 747965), (145, 149593), (227, 95555), (659, 32915), (1135, 19111), (3295, 6583)]