678558385

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{131}}^1\times {\mathrm{139}}^1\times {\mathrm{257}}^1$

素因数の和:561

約数の個数: 32

約数和(自身を含む): 858211200

約数和(自身を除く): 179652815

約数列:

[1, 5, 29, 131, 139, 145, 257, 655, 695, 1285, 3799, 4031, 7453, 18209, 18995, 20155, 33667, 35723, 37265, 91045, 168335, 178615, 528061, 976343, 1035967, 2640305, 4679713, 4881715, 5179835, 23398565, 135711677, 678558385]

約数ペア:

[(1, 678558385), (5, 135711677), (29, 23398565), (131, 5179835), (139, 4881715), (145, 4679713), (257, 2640305), (655, 1035967), (695, 976343), (1285, 528061), (3799, 178615), (4031, 168335), (7453, 91045), (18209, 37265), (18995, 35723), (20155, 33667)]