21472297

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{101}}^1\times {\mathrm{251}}^1$

素因数の和:381

約数の個数: 24

約数和(自身を含む): 27349056

約数和(自身を除く): 5876759

約数列:

[1, 7, 11, 77, 101, 121, 251, 707, 847, 1111, 1757, 2761, 7777, 12221, 19327, 25351, 30371, 85547, 177457, 212597, 278861, 1952027, 3067471, 21472297]

約数ペア:

[(1, 21472297), (7, 3067471), (11, 1952027), (77, 278861), (101, 212597), (121, 177457), (251, 85547), (707, 30371), (847, 25351), (1111, 19327), (1757, 12221), (2761, 7777)]