19877879

素因数分解:

$7^4\times {\mathrm{17}}^1\times {\mathrm{487}}^1$

素因数の和:532

約数の個数: 20

約数和(自身を含む): 24603984

約数和(自身を除く): 4726105

約数列:

[1, 7, 17, 49, 119, 343, 487, 833, 2401, 3409, 5831, 8279, 23863, 40817, 57953, 167041, 405671, 1169287, 2839697, 19877879]

約数ペア:

[(1, 19877879), (7, 2839697), (17, 1169287), (49, 405671), (119, 167041), (343, 57953), (487, 40817), (833, 23863), (2401, 8279), (3409, 5831)]