13211320

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{7681}}^1$

素因数の和:7735

約数の個数: 32

約数和(自身を含む): 30420720

約数和(自身を除く): 17209400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 7681, 15362, 30724, 38405, 61448, 76810, 153620, 307240, 330283, 660566, 1321132, 1651415, 2642264, 3302830, 6605660, 13211320]

約数ペア:

[(1, 13211320), (2, 6605660), (4, 3302830), (5, 2642264), (8, 1651415), (10, 1321132), (20, 660566), (40, 330283), (43, 307240), (86, 153620), (172, 76810), (215, 61448), (344, 38405), (430, 30724), (860, 15362), (1720, 7681)]