20497925

素因数分解:

$5^2\times 7^2\times {\mathrm{29}}^1\times {\mathrm{577}}^1$

素因数の和:630

約数の個数: 36

約数和(自身を含む): 30639780

約数和(自身を除く): 10141855

約数列:

[1, 5, 7, 25, 29, 35, 49, 145, 175, 203, 245, 577, 725, 1015, 1225, 1421, 2885, 4039, 5075, 7105, 14425, 16733, 20195, 28273, 35525, 83665, 100975, 117131, 141365, 418325, 585655, 706825, 819917, 2928275, 4099585, 20497925]

約数ペア:

[(1, 20497925), (5, 4099585), (7, 2928275), (25, 819917), (29, 706825), (35, 585655), (49, 418325), (145, 141365), (175, 117131), (203, 100975), (245, 83665), (577, 35525), (725, 28273), (1015, 20195), (1225, 16733), (1421, 14425), (2885, 7105), (4039, 5075)]