21378427

素因数分解:

$7^1\times {\mathrm{67}}^1\times {\mathrm{79}}^1\times {\mathrm{577}}^1$

素因数の和:730

約数の個数: 16

約数和(自身を含む): 25154560

約数和(自身を除く): 3776133

約数列:

[1, 7, 67, 79, 469, 553, 577, 4039, 5293, 37051, 38659, 45583, 270613, 319081, 3054061, 21378427]

約数ペア:

[(1, 21378427), (7, 3054061), (67, 319081), (79, 270613), (469, 45583), (553, 38659), (577, 37051), (4039, 5293)]