21781298

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{2111}}^1$

素因数の和:2198

約数の個数: 32

約数和(自身を含む): 41361408

約数和(自身を除く): 19580110

約数列:

[1, 2, 7, 11, 14, 22, 67, 77, 134, 154, 469, 737, 938, 1474, 2111, 4222, 5159, 10318, 14777, 23221, 29554, 46442, 141437, 162547, 282874, 325094, 990059, 1555807, 1980118, 3111614, 10890649, 21781298]

約数ペア:

[(1, 21781298), (2, 10890649), (7, 3111614), (11, 1980118), (14, 1555807), (22, 990059), (67, 325094), (77, 282874), (134, 162547), (154, 141437), (469, 46442), (737, 29554), (938, 23221), (1474, 14777), (2111, 10318), (4222, 5159)]