21475715

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{349}}^1\times {\mathrm{397}}^1$

素因数の和:782

約数の個数: 16

約数和(自身を含む): 26745600

約数和(自身を除く): 5269885

約数列:

[1, 5, 31, 155, 349, 397, 1745, 1985, 10819, 12307, 54095, 61535, 138553, 692765, 4295143, 21475715]

約数ペア:

[(1, 21475715), (5, 4295143), (31, 692765), (155, 138553), (349, 61535), (397, 54095), (1745, 12307), (1985, 10819)]