20721180

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{241}}^1\times {\mathrm{1433}}^1$

素因数の和:1686

約数の個数: 48

約数和(自身を含む): 58300704

約数和(自身を除く): 37579524

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 241, 482, 723, 964, 1205, 1433, 1446, 2410, 2866, 2892, 3615, 4299, 4820, 5732, 7165, 7230, 8598, 14330, 14460, 17196, 21495, 28660, 42990, 85980, 345353, 690706, 1036059, 1381412, 1726765, 2072118, 3453530, 4144236, 5180295, 6907060, 10360590, 20721180]

約数ペア:

[(1, 20721180), (2, 10360590), (3, 6907060), (4, 5180295), (5, 4144236), (6, 3453530), (10, 2072118), (12, 1726765), (15, 1381412), (20, 1036059), (30, 690706), (60, 345353), (241, 85980), (482, 42990), (723, 28660), (964, 21495), (1205, 17196), (1433, 14460), (1446, 14330), (2410, 8598), (2866, 7230), (2892, 7165), (3615, 5732), (4299, 4820)]