21207901

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{3449}}^1$

素因数の和:3516

約数の個数: 16

約数和(自身を含む): 25502400

約数和(自身を除く): 4294499

約数列:

[1, 11, 13, 43, 143, 473, 559, 3449, 6149, 37939, 44837, 148307, 493207, 1631377, 1927991, 21207901]

約数ペア:

[(1, 21207901), (11, 1927991), (13, 1631377), (43, 493207), (143, 148307), (473, 44837), (559, 37939), (3449, 6149)]