21640635

素因数分解:

$3^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{5171}}^1$

素因数の和:5216

約数の個数: 32

約数和(自身を含む): 39720960

約数和(自身を除く): 18080325

約数列:

[1, 3, 5, 9, 15, 27, 31, 45, 93, 135, 155, 279, 465, 837, 1395, 4185, 5171, 15513, 25855, 46539, 77565, 139617, 160301, 232695, 480903, 698085, 801505, 1442709, 2404515, 4328127, 7213545, 21640635]

約数ペア:

[(1, 21640635), (3, 7213545), (5, 4328127), (9, 2404515), (15, 1442709), (27, 801505), (31, 698085), (45, 480903), (93, 232695), (135, 160301), (155, 139617), (279, 77565), (465, 46539), (837, 25855), (1395, 15513), (4185, 5171)]