20406590

素因数分解:

$2^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{139}}^1\times {\mathrm{277}}^1$

素因数の和:476

約数の個数: 32

約数和(自身を含む): 37830240

約数和(自身を除く): 17423650

約数列:

[1, 2, 5, 10, 53, 106, 139, 265, 277, 278, 530, 554, 695, 1385, 1390, 2770, 7367, 14681, 14734, 29362, 36835, 38503, 73405, 73670, 77006, 146810, 192515, 385030, 2040659, 4081318, 10203295, 20406590]

約数ペア:

[(1, 20406590), (2, 10203295), (5, 4081318), (10, 2040659), (53, 385030), (106, 192515), (139, 146810), (265, 77006), (277, 73670), (278, 73405), (530, 38503), (554, 36835), (695, 29362), (1385, 14734), (1390, 14681), (2770, 7367)]