20821718

素因数分解:

$2^1\times {\mathrm{43}}^1\times {\mathrm{197}}^1\times {\mathrm{1229}}^1$

素因数の和:1471

約数の個数: 16

約数和(自身を含む): 32147280

約数和(自身を除く): 11325562

約数列:

[1, 2, 43, 86, 197, 394, 1229, 2458, 8471, 16942, 52847, 105694, 242113, 484226, 10410859, 20821718]

約数ペア:

[(1, 20821718), (2, 10410859), (43, 484226), (86, 242113), (197, 105694), (394, 52847), (1229, 16942), (2458, 8471)]