21586864

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{1549}}^1$

素因数の和:1637

約数の個数: 40

約数和(自身を含む): 45743600

約数和(自身を除く): 24156736

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 67, 104, 134, 208, 268, 536, 871, 1072, 1549, 1742, 3098, 3484, 6196, 6968, 12392, 13936, 20137, 24784, 40274, 80548, 103783, 161096, 207566, 322192, 415132, 830264, 1349179, 1660528, 2698358, 5396716, 10793432, 21586864]

約数ペア:

[(1, 21586864), (2, 10793432), (4, 5396716), (8, 2698358), (13, 1660528), (16, 1349179), (26, 830264), (52, 415132), (67, 322192), (104, 207566), (134, 161096), (208, 103783), (268, 80548), (536, 40274), (871, 24784), (1072, 20137), (1549, 13936), (1742, 12392), (3098, 6968), (3484, 6196)]