640215

素因数分解:

$3^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{347}}^1$

素因数の和:399

約数の個数: 24

約数和(自身を含む): 1140048

約数和(自身を除く): 499833

約数列:

[1, 3, 5, 9, 15, 41, 45, 123, 205, 347, 369, 615, 1041, 1735, 1845, 3123, 5205, 14227, 15615, 42681, 71135, 128043, 213405, 640215]

約数ペア:

[(1, 640215), (3, 213405), (5, 128043), (9, 71135), (15, 42681), (41, 15615), (45, 14227), (123, 5205), (205, 3123), (347, 1845), (369, 1735), (615, 1041)]