20981460

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{241}}^1\times {\mathrm{1451}}^1$

素因数の和:1704

約数の個数: 48

約数和(自身を含む): 59032512

約数和(自身を除く): 38051052

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 241, 482, 723, 964, 1205, 1446, 1451, 2410, 2892, 2902, 3615, 4353, 4820, 5804, 7230, 7255, 8706, 14460, 14510, 17412, 21765, 29020, 43530, 87060, 349691, 699382, 1049073, 1398764, 1748455, 2098146, 3496910, 4196292, 5245365, 6993820, 10490730, 20981460]

約数ペア:

[(1, 20981460), (2, 10490730), (3, 6993820), (4, 5245365), (5, 4196292), (6, 3496910), (10, 2098146), (12, 1748455), (15, 1398764), (20, 1049073), (30, 699382), (60, 349691), (241, 87060), (482, 43530), (723, 29020), (964, 21765), (1205, 17412), (1446, 14510), (1451, 14460), (2410, 8706), (2892, 7255), (2902, 7230), (3615, 5804), (4353, 4820)]