21438412

素因数分解:

$2^2\times {\mathrm{131}}^1\times {\mathrm{163}}^1\times {\mathrm{251}}^1$

素因数の和:549

約数の個数: 24

約数和(自身を含む): 38187072

約数和(自身を除く): 16748660

約数列:

[1, 2, 4, 131, 163, 251, 262, 326, 502, 524, 652, 1004, 21353, 32881, 40913, 42706, 65762, 81826, 85412, 131524, 163652, 5359603, 10719206, 21438412]

約数ペア:

[(1, 21438412), (2, 10719206), (4, 5359603), (131, 163652), (163, 131524), (251, 85412), (262, 81826), (326, 65762), (502, 42706), (524, 40913), (652, 32881), (1004, 21353)]