20961915

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{8269}}^1$

素因数の和:8303

約数の個数: 24

約数和(自身を含む): 36321840

約数和(自身を除く): 15359925

約数列:

[1, 3, 5, 13, 15, 39, 65, 169, 195, 507, 845, 2535, 8269, 24807, 41345, 107497, 124035, 322491, 537485, 1397461, 1612455, 4192383, 6987305, 20961915]

約数ペア:

[(1, 20961915), (3, 6987305), (5, 4192383), (13, 1612455), (15, 1397461), (39, 537485), (65, 322491), (169, 124035), (195, 107497), (507, 41345), (845, 24807), (2535, 8269)]