18986985

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{419}}^1$

素因数の和:502

約数の個数: 48

約数和(自身を含む): 35380800

約数和(自身を除く): 16393815

約数列:

[1, 3, 5, 9, 15, 19, 45, 53, 57, 95, 159, 171, 265, 285, 419, 477, 795, 855, 1007, 1257, 2095, 2385, 3021, 3771, 5035, 6285, 7961, 9063, 15105, 18855, 22207, 23883, 39805, 45315, 66621, 71649, 111035, 119415, 199863, 333105, 358245, 421933, 999315, 1265799, 2109665, 3797397, 6328995, 18986985]

約数ペア:

[(1, 18986985), (3, 6328995), (5, 3797397), (9, 2109665), (15, 1265799), (19, 999315), (45, 421933), (53, 358245), (57, 333105), (95, 199863), (159, 119415), (171, 111035), (265, 71649), (285, 66621), (419, 45315), (477, 39805), (795, 23883), (855, 22207), (1007, 18855), (1257, 15105), (2095, 9063), (2385, 7961), (3021, 6285), (3771, 5035)]