19511420

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1\times {\mathrm{233}}^1$

素因数の和:374

約数の個数: 48

約数和(自身を含む): 42456960

約数和(自身を除く): 22945540

約数列:

[1, 2, 4, 5, 10, 20, 53, 79, 106, 158, 212, 233, 265, 316, 395, 466, 530, 790, 932, 1060, 1165, 1580, 2330, 4187, 4660, 8374, 12349, 16748, 18407, 20935, 24698, 36814, 41870, 49396, 61745, 73628, 83740, 92035, 123490, 184070, 246980, 368140, 975571, 1951142, 3902284, 4877855, 9755710, 19511420]

約数ペア:

[(1, 19511420), (2, 9755710), (4, 4877855), (5, 3902284), (10, 1951142), (20, 975571), (53, 368140), (79, 246980), (106, 184070), (158, 123490), (212, 92035), (233, 83740), (265, 73628), (316, 61745), (395, 49396), (466, 41870), (530, 36814), (790, 24698), (932, 20935), (1060, 18407), (1165, 16748), (1580, 12349), (2330, 8374), (4187, 4660)]