81381580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{5333}}^1$

素因数の和:5458

約数の個数: 48

約数和(自身を含む): 197144640

約数和(自身を除く): 115763060

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 109, 140, 218, 436, 545, 763, 1090, 1526, 2180, 3052, 3815, 5333, 7630, 10666, 15260, 21332, 26665, 37331, 53330, 74662, 106660, 149324, 186655, 373310, 581297, 746620, 1162594, 2325188, 2906485, 4069079, 5812970, 8138158, 11625940, 16276316, 20345395, 40690790, 81381580]

約数ペア:

[(1, 81381580), (2, 40690790), (4, 20345395), (5, 16276316), (7, 11625940), (10, 8138158), (14, 5812970), (20, 4069079), (28, 2906485), (35, 2325188), (70, 1162594), (109, 746620), (140, 581297), (218, 373310), (436, 186655), (545, 149324), (763, 106660), (1090, 74662), (1526, 53330), (2180, 37331), (3052, 26665), (3815, 21332), (5333, 15260), (7630, 10666)]