18740740

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{167}}^1\times {\mathrm{181}}^1$

素因数の和:388

約数の個数: 48

約数和(自身を含む): 41094144

約数和(自身を除く): 22353404

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 167, 181, 310, 334, 362, 620, 668, 724, 835, 905, 1670, 1810, 3340, 3620, 5177, 5611, 10354, 11222, 20708, 22444, 25885, 28055, 30227, 51770, 56110, 60454, 103540, 112220, 120908, 151135, 302270, 604540, 937037, 1874074, 3748148, 4685185, 9370370, 18740740]

約数ペア:

[(1, 18740740), (2, 9370370), (4, 4685185), (5, 3748148), (10, 1874074), (20, 937037), (31, 604540), (62, 302270), (124, 151135), (155, 120908), (167, 112220), (181, 103540), (310, 60454), (334, 56110), (362, 51770), (620, 30227), (668, 28055), (724, 25885), (835, 22444), (905, 20708), (1670, 11222), (1810, 10354), (3340, 5611), (3620, 5177)]