20451915

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{523}}^1$

素因数の和:624

約数の個数: 48

約数和(自身を含む): 39237120

約数和(自身を除く): 18785205

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 79, 99, 165, 237, 395, 495, 523, 711, 869, 1185, 1569, 2607, 2615, 3555, 4345, 4707, 5753, 7821, 7845, 13035, 17259, 23535, 28765, 39105, 41317, 51777, 86295, 123951, 206585, 258885, 371853, 454487, 619755, 1363461, 1859265, 2272435, 4090383, 6817305, 20451915]

約数ペア:

[(1, 20451915), (3, 6817305), (5, 4090383), (9, 2272435), (11, 1859265), (15, 1363461), (33, 619755), (45, 454487), (55, 371853), (79, 258885), (99, 206585), (165, 123951), (237, 86295), (395, 51777), (495, 41317), (523, 39105), (711, 28765), (869, 23535), (1185, 17259), (1569, 13035), (2607, 7845), (2615, 7821), (3555, 5753), (4345, 4707)]