21275079

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{751}}^1$

素因数の和:851

約数の個数: 32

約数和(自身を含む): 34652160

約数和(自身を除く): 13377081

約数列:

[1, 3, 7, 19, 21, 57, 71, 133, 213, 399, 497, 751, 1349, 1491, 2253, 4047, 5257, 9443, 14269, 15771, 28329, 42807, 53321, 99883, 159963, 299649, 373247, 1013099, 1119741, 3039297, 7091693, 21275079]

約数ペア:

[(1, 21275079), (3, 7091693), (7, 3039297), (19, 1119741), (21, 1013099), (57, 373247), (71, 299649), (133, 159963), (213, 99883), (399, 53321), (497, 42807), (751, 28329), (1349, 15771), (1491, 14269), (2253, 9443), (4047, 5257)]