18343820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{419}}^1$

素因数の和:638

約数の個数: 48

約数和(自身を含む): 42336000

約数和(自身を除く): 23992180

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 199, 220, 398, 419, 796, 838, 995, 1676, 1990, 2095, 2189, 3980, 4190, 4378, 4609, 8380, 8756, 9218, 10945, 18436, 21890, 23045, 43780, 46090, 83381, 92180, 166762, 333524, 416905, 833810, 917191, 1667620, 1834382, 3668764, 4585955, 9171910, 18343820]

約数ペア:

[(1, 18343820), (2, 9171910), (4, 4585955), (5, 3668764), (10, 1834382), (11, 1667620), (20, 917191), (22, 833810), (44, 416905), (55, 333524), (110, 166762), (199, 92180), (220, 83381), (398, 46090), (419, 43780), (796, 23045), (838, 21890), (995, 18436), (1676, 10945), (1990, 9218), (2095, 8756), (2189, 8380), (3980, 4609), (4190, 4378)]