18378415

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{409}}^1$

素因数の和:487

約数の個数: 32

約数和(自身を含む): 25977600

約数和(自身を除く): 7599185

約数列:

[1, 5, 11, 19, 43, 55, 95, 209, 215, 409, 473, 817, 1045, 2045, 2365, 4085, 4499, 7771, 8987, 17587, 22495, 38855, 44935, 85481, 87935, 193457, 334153, 427405, 967285, 1670765, 3675683, 18378415]

約数ペア:

[(1, 18378415), (5, 3675683), (11, 1670765), (19, 967285), (43, 427405), (55, 334153), (95, 193457), (209, 87935), (215, 85481), (409, 44935), (473, 38855), (817, 22495), (1045, 17587), (2045, 8987), (2365, 7771), (4085, 4499)]