398758520

素因数分解:

$2^3\times 5^1\times {\mathrm{347}}^1\times {\mathrm{28729}}^1$

素因数の和:29087

約数の個数: 32

約数和(自身を含む): 899823600

約数和(自身を除く): 501065080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 347, 694, 1388, 1735, 2776, 3470, 6940, 13880, 28729, 57458, 114916, 143645, 229832, 287290, 574580, 1149160, 9968963, 19937926, 39875852, 49844815, 79751704, 99689630, 199379260, 398758520]

約数ペア:

[(1, 398758520), (2, 199379260), (4, 99689630), (5, 79751704), (8, 49844815), (10, 39875852), (20, 19937926), (40, 9968963), (347, 1149160), (694, 574580), (1388, 287290), (1735, 229832), (2776, 143645), (3470, 114916), (6940, 57458), (13880, 28729)]