21486790

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{839}}^1$

素因数の和:1056

約数の個数: 32

約数和(自身を含む): 41912640

約数和(自身を除く): 20425850

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 197, 394, 839, 985, 1678, 1970, 2561, 4195, 5122, 8390, 10907, 12805, 21814, 25610, 54535, 109070, 165283, 330566, 826415, 1652830, 2148679, 4297358, 10743395, 21486790]

約数ペア:

[(1, 21486790), (2, 10743395), (5, 4297358), (10, 2148679), (13, 1652830), (26, 826415), (65, 330566), (130, 165283), (197, 109070), (394, 54535), (839, 25610), (985, 21814), (1678, 12805), (1970, 10907), (2561, 8390), (4195, 5122)]