18203990

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{97}}^1\times {\mathrm{383}}^1$

素因数の和:501

約数の個数: 48

約数和(自身を含む): 38610432

約数和(自身を除く): 20406442

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 97, 98, 194, 245, 383, 485, 490, 679, 766, 970, 1358, 1915, 2681, 3395, 3830, 4753, 5362, 6790, 9506, 13405, 18767, 23765, 26810, 37151, 37534, 47530, 74302, 93835, 185755, 187670, 260057, 371510, 520114, 1300285, 1820399, 2600570, 3640798, 9101995, 18203990]

約数ペア:

[(1, 18203990), (2, 9101995), (5, 3640798), (7, 2600570), (10, 1820399), (14, 1300285), (35, 520114), (49, 371510), (70, 260057), (97, 187670), (98, 185755), (194, 93835), (245, 74302), (383, 47530), (485, 37534), (490, 37151), (679, 26810), (766, 23765), (970, 18767), (1358, 13405), (1915, 9506), (2681, 6790), (3395, 5362), (3830, 4753)]