20400775

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{1481}}^1$

素因数の和:1539

約数の個数: 24

約数和(自身を含む): 27565200

約数和(自身を除く): 7164425

約数列:

[1, 5, 19, 25, 29, 95, 145, 475, 551, 725, 1481, 2755, 7405, 13775, 28139, 37025, 42949, 140695, 214745, 703475, 816031, 1073725, 4080155, 20400775]

約数ペア:

[(1, 20400775), (5, 4080155), (19, 1073725), (25, 816031), (29, 703475), (95, 214745), (145, 140695), (475, 42949), (551, 37025), (725, 28139), (1481, 13775), (2755, 7405)]