138609080

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{56807}}^1$

素因数の和:56879

約数の個数: 32

約数和(自身を含む): 316988640

約数和(自身を除く): 178379560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 56807, 113614, 227228, 284035, 454456, 568070, 1136140, 2272280, 3465227, 6930454, 13860908, 17326135, 27721816, 34652270, 69304540, 138609080]

約数ペア:

[(1, 138609080), (2, 69304540), (4, 34652270), (5, 27721816), (8, 17326135), (10, 13860908), (20, 6930454), (40, 3465227), (61, 2272280), (122, 1136140), (244, 568070), (305, 454456), (488, 284035), (610, 227228), (1220, 113614), (2440, 56807)]