1388767580

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{991}}^1\times {\mathrm{1709}}^1$

素因数の和:2750

約数の個数: 48

約数和(自身を含む): 2992308480

約数和(自身を除く): 1603540900

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 991, 1709, 1982, 3418, 3964, 4955, 6836, 8545, 9910, 17090, 19820, 34180, 40631, 70069, 81262, 140138, 162524, 203155, 280276, 350345, 406310, 700690, 812620, 1401380, 1693619, 3387238, 6774476, 8468095, 16936190, 33872380, 69438379, 138876758, 277753516, 347191895, 694383790, 1388767580]

約数ペア:

[(1, 1388767580), (2, 694383790), (4, 347191895), (5, 277753516), (10, 138876758), (20, 69438379), (41, 33872380), (82, 16936190), (164, 8468095), (205, 6774476), (410, 3387238), (820, 1693619), (991, 1401380), (1709, 812620), (1982, 700690), (3418, 406310), (3964, 350345), (4955, 280276), (6836, 203155), (8545, 162524), (9910, 140138), (17090, 81262), (19820, 70069), (34180, 40631)]