18189880

素因数分解:

$2^3\times 5^1\times {\mathrm{349}}^1\times {\mathrm{1303}}^1$

素因数の和:1663

約数の個数: 32

約数和(自身を含む): 41076000

約数和(自身を除く): 22886120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 349, 698, 1303, 1396, 1745, 2606, 2792, 3490, 5212, 6515, 6980, 10424, 13030, 13960, 26060, 52120, 454747, 909494, 1818988, 2273735, 3637976, 4547470, 9094940, 18189880]

約数ペア:

[(1, 18189880), (2, 9094940), (4, 4547470), (5, 3637976), (8, 2273735), (10, 1818988), (20, 909494), (40, 454747), (349, 52120), (698, 26060), (1303, 13960), (1396, 13030), (1745, 10424), (2606, 6980), (2792, 6515), (3490, 5212)]