399778820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{643}}^1\times {\mathrm{4441}}^1$

素因数の和:5100

約数の個数: 48

約数和(自身を含む): 961177728

約数和(自身を除く): 561398908

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 643, 1286, 2572, 3215, 4441, 4501, 6430, 8882, 9002, 12860, 17764, 18004, 22205, 22505, 31087, 44410, 45010, 62174, 88820, 90020, 124348, 155435, 310870, 621740, 2855563, 5711126, 11422252, 14277815, 19988941, 28555630, 39977882, 57111260, 79955764, 99944705, 199889410, 399778820]

約数ペア:

[(1, 399778820), (2, 199889410), (4, 99944705), (5, 79955764), (7, 57111260), (10, 39977882), (14, 28555630), (20, 19988941), (28, 14277815), (35, 11422252), (70, 5711126), (140, 2855563), (643, 621740), (1286, 310870), (2572, 155435), (3215, 124348), (4441, 90020), (4501, 88820), (6430, 62174), (8882, 45010), (9002, 44410), (12860, 31087), (17764, 22505), (18004, 22205)]