19998180

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{241}}^1\times {\mathrm{461}}^1$

素因数の和:717

約数の個数: 72

約数和(自身を含む): 61044984

約数和(自身を除く): 41046804

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 241, 461, 482, 723, 922, 964, 1205, 1383, 1446, 1844, 2169, 2305, 2410, 2766, 2892, 3615, 4149, 4338, 4610, 4820, 5532, 6915, 7230, 8298, 8676, 9220, 10845, 13830, 14460, 16596, 20745, 21690, 27660, 41490, 43380, 82980, 111101, 222202, 333303, 444404, 555505, 666606, 999909, 1111010, 1333212, 1666515, 1999818, 2222020, 3333030, 3999636, 4999545, 6666060, 9999090, 19998180]

約数ペア:

[(1, 19998180), (2, 9999090), (3, 6666060), (4, 4999545), (5, 3999636), (6, 3333030), (9, 2222020), (10, 1999818), (12, 1666515), (15, 1333212), (18, 1111010), (20, 999909), (30, 666606), (36, 555505), (45, 444404), (60, 333303), (90, 222202), (180, 111101), (241, 82980), (461, 43380), (482, 41490), (723, 27660), (922, 21690), (964, 20745), (1205, 16596), (1383, 14460), (1446, 13830), (1844, 10845), (2169, 9220), (2305, 8676), (2410, 8298), (2766, 7230), (2892, 6915), (3615, 5532), (4149, 4820), (4338, 4610)]