20345872

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{571}}^1$

素因数の和:727

約数の個数: 40

約数和(自身を含む): 42131232

約数和(自身を除く): 21785360

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 131, 136, 262, 272, 524, 571, 1048, 1142, 2096, 2227, 2284, 4454, 4568, 8908, 9136, 9707, 17816, 19414, 35632, 38828, 74801, 77656, 149602, 155312, 299204, 598408, 1196816, 1271617, 2543234, 5086468, 10172936, 20345872]

約数ペア:

[(1, 20345872), (2, 10172936), (4, 5086468), (8, 2543234), (16, 1271617), (17, 1196816), (34, 598408), (68, 299204), (131, 155312), (136, 149602), (262, 77656), (272, 74801), (524, 38828), (571, 35632), (1048, 19414), (1142, 17816), (2096, 9707), (2227, 9136), (2284, 8908), (4454, 4568)]