18278680

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{673}}^1$

素因数の和:788

約数の個数: 64

約数和(自身を含む): 47557440

約数和(自身を除く): 29278760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 97, 140, 194, 280, 388, 485, 673, 679, 776, 970, 1346, 1358, 1940, 2692, 2716, 3365, 3395, 3880, 4711, 5384, 5432, 6730, 6790, 9422, 13460, 13580, 18844, 23555, 26920, 27160, 37688, 47110, 65281, 94220, 130562, 188440, 261124, 326405, 456967, 522248, 652810, 913934, 1305620, 1827868, 2284835, 2611240, 3655736, 4569670, 9139340, 18278680]

約数ペア:

[(1, 18278680), (2, 9139340), (4, 4569670), (5, 3655736), (7, 2611240), (8, 2284835), (10, 1827868), (14, 1305620), (20, 913934), (28, 652810), (35, 522248), (40, 456967), (56, 326405), (70, 261124), (97, 188440), (140, 130562), (194, 94220), (280, 65281), (388, 47110), (485, 37688), (673, 27160), (679, 26920), (776, 23555), (970, 18844), (1346, 13580), (1358, 13460), (1940, 9422), (2692, 6790), (2716, 6730), (3365, 5432), (3395, 5384), (3880, 4711)]