21531920

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{9281}}^1$

素因数の和:9323

約数の個数: 40

約数和(自身を含む): 51793560

約数和(自身を除く): 30261640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 80, 116, 145, 232, 290, 464, 580, 1160, 2320, 9281, 18562, 37124, 46405, 74248, 92810, 148496, 185620, 269149, 371240, 538298, 742480, 1076596, 1345745, 2153192, 2691490, 4306384, 5382980, 10765960, 21531920]

約数ペア:

[(1, 21531920), (2, 10765960), (4, 5382980), (5, 4306384), (8, 2691490), (10, 2153192), (16, 1345745), (20, 1076596), (29, 742480), (40, 538298), (58, 371240), (80, 269149), (116, 185620), (145, 148496), (232, 92810), (290, 74248), (464, 46405), (580, 37124), (1160, 18562), (2320, 9281)]