18615560

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{137}}^1$

素因数の和:270

約数の個数: 64

約数和(自身を含む): 43718400

約数和(自身を除く): 25102840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 79, 86, 137, 158, 172, 215, 274, 316, 344, 395, 430, 548, 632, 685, 790, 860, 1096, 1370, 1580, 1720, 2740, 3160, 3397, 5480, 5891, 6794, 10823, 11782, 13588, 16985, 21646, 23564, 27176, 29455, 33970, 43292, 47128, 54115, 58910, 67940, 86584, 108230, 117820, 135880, 216460, 235640, 432920, 465389, 930778, 1861556, 2326945, 3723112, 4653890, 9307780, 18615560]

約数ペア:

[(1, 18615560), (2, 9307780), (4, 4653890), (5, 3723112), (8, 2326945), (10, 1861556), (20, 930778), (40, 465389), (43, 432920), (79, 235640), (86, 216460), (137, 135880), (158, 117820), (172, 108230), (215, 86584), (274, 67940), (316, 58910), (344, 54115), (395, 47128), (430, 43292), (548, 33970), (632, 29455), (685, 27176), (790, 23564), (860, 21646), (1096, 16985), (1370, 13588), (1580, 11782), (1720, 10823), (2740, 6794), (3160, 5891), (3397, 5480)]