18438820

素因数分解:

$2^2\times 5^1\times {\mathrm{659}}^1\times {\mathrm{1399}}^1$

素因数の和:2067

約数の個数: 24

約数和(自身を含む): 38808000

約数和(自身を除く): 20369180

約数列:

[1, 2, 4, 5, 10, 20, 659, 1318, 1399, 2636, 2798, 3295, 5596, 6590, 6995, 13180, 13990, 27980, 921941, 1843882, 3687764, 4609705, 9219410, 18438820]

約数ペア:

[(1, 18438820), (2, 9219410), (4, 4609705), (5, 3687764), (10, 1843882), (20, 921941), (659, 27980), (1318, 13990), (1399, 13180), (2636, 6995), (2798, 6590), (3295, 5596)]