18027320

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{223}}^1$

素因数の和:324

約数の個数: 64

約数和(自身を含む): 42577920

約数和(自身を除く): 24550600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 47, 86, 94, 172, 188, 215, 223, 235, 344, 376, 430, 446, 470, 860, 892, 940, 1115, 1720, 1784, 1880, 2021, 2230, 4042, 4460, 8084, 8920, 9589, 10105, 10481, 16168, 19178, 20210, 20962, 38356, 40420, 41924, 47945, 52405, 76712, 80840, 83848, 95890, 104810, 191780, 209620, 383560, 419240, 450683, 901366, 1802732, 2253415, 3605464, 4506830, 9013660, 18027320]

約数ペア:

[(1, 18027320), (2, 9013660), (4, 4506830), (5, 3605464), (8, 2253415), (10, 1802732), (20, 901366), (40, 450683), (43, 419240), (47, 383560), (86, 209620), (94, 191780), (172, 104810), (188, 95890), (215, 83848), (223, 80840), (235, 76712), (344, 52405), (376, 47945), (430, 41924), (446, 40420), (470, 38356), (860, 20962), (892, 20210), (940, 19178), (1115, 16168), (1720, 10481), (1784, 10105), (1880, 9589), (2021, 8920), (2230, 8084), (4042, 4460)]