20171860

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{751}}^1$

素因数の和:856

約数の個数: 48

約数和(自身を含む): 45480960

約数和(自身を除く): 25309100

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 79, 85, 158, 170, 316, 340, 395, 751, 790, 1343, 1502, 1580, 2686, 3004, 3755, 5372, 6715, 7510, 12767, 13430, 15020, 25534, 26860, 51068, 59329, 63835, 118658, 127670, 237316, 255340, 296645, 593290, 1008593, 1186580, 2017186, 4034372, 5042965, 10085930, 20171860]

約数ペア:

[(1, 20171860), (2, 10085930), (4, 5042965), (5, 4034372), (10, 2017186), (17, 1186580), (20, 1008593), (34, 593290), (68, 296645), (79, 255340), (85, 237316), (158, 127670), (170, 118658), (316, 63835), (340, 59329), (395, 51068), (751, 26860), (790, 25534), (1343, 15020), (1502, 13430), (1580, 12767), (2686, 7510), (3004, 6715), (3755, 5372)]