21389576

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{4783}}^1$

素因数の和:4845

約数の個数: 32

約数和(自身を含む): 44204160

約数和(自身を除く): 22814584

約数列:

[1, 2, 4, 8, 13, 26, 43, 52, 86, 104, 172, 344, 559, 1118, 2236, 4472, 4783, 9566, 19132, 38264, 62179, 124358, 205669, 248716, 411338, 497432, 822676, 1645352, 2673697, 5347394, 10694788, 21389576]

約数ペア:

[(1, 21389576), (2, 10694788), (4, 5347394), (8, 2673697), (13, 1645352), (26, 822676), (43, 497432), (52, 411338), (86, 248716), (104, 205669), (172, 124358), (344, 62179), (559, 38264), (1118, 19132), (2236, 9566), (4472, 4783)]