20698520

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{499}}^1$

素因数の和:588

約数の個数: 64

約数和(自身を含む): 50220000

約数和(自身を除く): 29521480

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 61, 68, 85, 122, 136, 170, 244, 305, 340, 488, 499, 610, 680, 998, 1037, 1220, 1996, 2074, 2440, 2495, 3992, 4148, 4990, 5185, 8296, 8483, 9980, 10370, 16966, 19960, 20740, 30439, 33932, 41480, 42415, 60878, 67864, 84830, 121756, 152195, 169660, 243512, 304390, 339320, 517463, 608780, 1034926, 1217560, 2069852, 2587315, 4139704, 5174630, 10349260, 20698520]

約数ペア:

[(1, 20698520), (2, 10349260), (4, 5174630), (5, 4139704), (8, 2587315), (10, 2069852), (17, 1217560), (20, 1034926), (34, 608780), (40, 517463), (61, 339320), (68, 304390), (85, 243512), (122, 169660), (136, 152195), (170, 121756), (244, 84830), (305, 67864), (340, 60878), (488, 42415), (499, 41480), (610, 33932), (680, 30439), (998, 20740), (1037, 19960), (1220, 16966), (1996, 10370), (2074, 9980), (2440, 8483), (2495, 8296), (3992, 5185), (4148, 4990)]