11990120

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{6971}}^1$

素因数の和:7025

約数の個数: 32

約数和(自身を含む): 27609120

約数和(自身を除く): 15619000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 6971, 13942, 27884, 34855, 55768, 69710, 139420, 278840, 299753, 599506, 1199012, 1498765, 2398024, 2997530, 5995060, 11990120]

約数ペア:

[(1, 11990120), (2, 5995060), (4, 2997530), (5, 2398024), (8, 1498765), (10, 1199012), (20, 599506), (40, 299753), (43, 278840), (86, 139420), (172, 69710), (215, 55768), (344, 34855), (430, 27884), (860, 13942), (1720, 6971)]