18430180

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{12979}}^1$

素因数の和:13059

約数の個数: 24

約数和(自身を含む): 39251520

約数和(自身を除く): 20821340

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 12979, 25958, 51916, 64895, 129790, 259580, 921509, 1843018, 3686036, 4607545, 9215090, 18430180]

約数ペア:

[(1, 18430180), (2, 9215090), (4, 4607545), (5, 3686036), (10, 1843018), (20, 921509), (71, 259580), (142, 129790), (284, 64895), (355, 51916), (710, 25958), (1420, 12979)]