20104455

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{1609}}^1$

素因数の和:1648

約数の個数: 48

約数和(自身を含む): 39644640

約数和(自身を除く): 19540185

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 49, 51, 85, 105, 119, 147, 245, 255, 357, 595, 735, 833, 1609, 1785, 2499, 4165, 4827, 8045, 11263, 12495, 24135, 27353, 33789, 56315, 78841, 82059, 136765, 168945, 191471, 236523, 394205, 410295, 574413, 957355, 1182615, 1340297, 2872065, 4020891, 6701485, 20104455]

約数ペア:

[(1, 20104455), (3, 6701485), (5, 4020891), (7, 2872065), (15, 1340297), (17, 1182615), (21, 957355), (35, 574413), (49, 410295), (51, 394205), (85, 236523), (105, 191471), (119, 168945), (147, 136765), (245, 82059), (255, 78841), (357, 56315), (595, 33789), (735, 27353), (833, 24135), (1609, 12495), (1785, 11263), (2499, 8045), (4165, 4827)]