21072662009

素因数分解:

$7^1\times {\mathrm{409}}^1\times {\mathrm{421}}^1\times {\mathrm{17483}}^1$

素因数の和:18320

約数の個数: 16

約数和(自身を含む): 24200653440

約数和(自身を除く): 3127991431

約数列:

[1, 7, 409, 421, 2863, 2947, 17483, 122381, 172189, 1205323, 7150547, 7360343, 50053829, 51522401, 3010380287, 21072662009]

約数ペア:

[(1, 21072662009), (7, 3010380287), (409, 51522401), (421, 50053829), (2863, 7360343), (2947, 7150547), (17483, 1205323), (122381, 172189)]