81663880

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{601}}^1$

素因数の和:734

約数の個数: 64

約数和(自身を含む): 190713600

約数和(自身を除く): 109049720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 79, 86, 158, 172, 215, 316, 344, 395, 430, 601, 632, 790, 860, 1202, 1580, 1720, 2404, 3005, 3160, 3397, 4808, 6010, 6794, 12020, 13588, 16985, 24040, 25843, 27176, 33970, 47479, 51686, 67940, 94958, 103372, 129215, 135880, 189916, 206744, 237395, 258430, 379832, 474790, 516860, 949580, 1033720, 1899160, 2041597, 4083194, 8166388, 10207985, 16332776, 20415970, 40831940, 81663880]

約数ペア:

[(1, 81663880), (2, 40831940), (4, 20415970), (5, 16332776), (8, 10207985), (10, 8166388), (20, 4083194), (40, 2041597), (43, 1899160), (79, 1033720), (86, 949580), (158, 516860), (172, 474790), (215, 379832), (316, 258430), (344, 237395), (395, 206744), (430, 189916), (601, 135880), (632, 129215), (790, 103372), (860, 94958), (1202, 67940), (1580, 51686), (1720, 47479), (2404, 33970), (3005, 27176), (3160, 25843), (3397, 24040), (4808, 16985), (6010, 13588), (6794, 12020)]