20191540

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{1123}}^1$

素因数の和:1192

約数の個数: 48

約数和(自身を含む): 45319680

約数和(自身を除く): 25128140

約数列:

[1, 2, 4, 5, 10, 20, 29, 31, 58, 62, 116, 124, 145, 155, 290, 310, 580, 620, 899, 1123, 1798, 2246, 3596, 4492, 4495, 5615, 8990, 11230, 17980, 22460, 32567, 34813, 65134, 69626, 130268, 139252, 162835, 174065, 325670, 348130, 651340, 696260, 1009577, 2019154, 4038308, 5047885, 10095770, 20191540]

約数ペア:

[(1, 20191540), (2, 10095770), (4, 5047885), (5, 4038308), (10, 2019154), (20, 1009577), (29, 696260), (31, 651340), (58, 348130), (62, 325670), (116, 174065), (124, 162835), (145, 139252), (155, 130268), (290, 69626), (310, 65134), (580, 34813), (620, 32567), (899, 22460), (1123, 17980), (1798, 11230), (2246, 8990), (3596, 5615), (4492, 4495)]