20979028

素因数分解:

$2^2\times 7^1\times {\mathrm{683}}^1\times {\mathrm{1097}}^1$

素因数の和:1791

約数の個数: 24

約数和(自身を含む): 42057792

約数和(自身を除く): 21078764

約数列:

[1, 2, 4, 7, 14, 28, 683, 1097, 1366, 2194, 2732, 4388, 4781, 7679, 9562, 15358, 19124, 30716, 749251, 1498502, 2997004, 5244757, 10489514, 20979028]

約数ペア:

[(1, 20979028), (2, 10489514), (4, 5244757), (7, 2997004), (14, 1498502), (28, 749251), (683, 30716), (1097, 19124), (1366, 15358), (2194, 9562), (2732, 7679), (4388, 4781)]