21361808

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{102701}}^1$

素因数の和:102722

約数の個数: 20

約数和(自身を含む): 44572668

約数和(自身を除く): 23210860

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 102701, 205402, 410804, 821608, 1335113, 1643216, 2670226, 5340452, 10680904, 21361808]

約数ペア:

[(1, 21361808), (2, 10680904), (4, 5340452), (8, 2670226), (13, 1643216), (16, 1335113), (26, 821608), (52, 410804), (104, 205402), (208, 102701)]