20182580

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{461}}^1$

素因数の和:680

約数の個数: 48

約数和(自身を含む): 46569600

約数和(自身を除く): 26387020

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 199, 220, 398, 461, 796, 922, 995, 1844, 1990, 2189, 2305, 3980, 4378, 4610, 5071, 8756, 9220, 10142, 10945, 20284, 21890, 25355, 43780, 50710, 91739, 101420, 183478, 366956, 458695, 917390, 1009129, 1834780, 2018258, 4036516, 5045645, 10091290, 20182580]

約数ペア:

[(1, 20182580), (2, 10091290), (4, 5045645), (5, 4036516), (10, 2018258), (11, 1834780), (20, 1009129), (22, 917390), (44, 458695), (55, 366956), (110, 183478), (199, 101420), (220, 91739), (398, 50710), (461, 43780), (796, 25355), (922, 21890), (995, 20284), (1844, 10945), (1990, 10142), (2189, 9220), (2305, 8756), (3980, 5071), (4378, 4610)]