20902910

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{1471}}^1$

素因数の和:1521

約数の個数: 48

約数和(自身を含む): 45308160

約数和(自身を除く): 24405250

約数列:

[1, 2, 5, 7, 10, 14, 29, 35, 49, 58, 70, 98, 145, 203, 245, 290, 406, 490, 1015, 1421, 1471, 2030, 2842, 2942, 7105, 7355, 10297, 14210, 14710, 20594, 42659, 51485, 72079, 85318, 102970, 144158, 213295, 298613, 360395, 426590, 597226, 720790, 1493065, 2090291, 2986130, 4180582, 10451455, 20902910]

約数ペア:

[(1, 20902910), (2, 10451455), (5, 4180582), (7, 2986130), (10, 2090291), (14, 1493065), (29, 720790), (35, 597226), (49, 426590), (58, 360395), (70, 298613), (98, 213295), (145, 144158), (203, 102970), (245, 85318), (290, 72079), (406, 51485), (490, 42659), (1015, 20594), (1421, 14710), (1471, 14210), (2030, 10297), (2842, 7355), (2942, 7105)]