20738725

素因数分解:

$5^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{6971}}^1$

素因数の和:7005

約数の個数: 24

約数和(自身を含む): 31123008

約数和(自身を除く): 10384283

約数列:

[1, 5, 7, 17, 25, 35, 85, 119, 175, 425, 595, 2975, 6971, 34855, 48797, 118507, 174275, 243985, 592535, 829549, 1219925, 2962675, 4147745, 20738725]

約数ペア:

[(1, 20738725), (5, 4147745), (7, 2962675), (17, 1219925), (25, 829549), (35, 592535), (85, 243985), (119, 174275), (175, 118507), (425, 48797), (595, 34855), (2975, 6971)]