21439390

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{163}}^1\times {\mathrm{1879}}^1$

素因数の和:2056

約数の個数: 32

約数和(自身を含む): 44398080

約数和(自身を除く): 22958690

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 163, 326, 815, 1141, 1630, 1879, 2282, 3758, 5705, 9395, 11410, 13153, 18790, 26306, 65765, 131530, 306277, 612554, 1531385, 2143939, 3062770, 4287878, 10719695, 21439390]

約数ペア:

[(1, 21439390), (2, 10719695), (5, 4287878), (7, 3062770), (10, 2143939), (14, 1531385), (35, 612554), (70, 306277), (163, 131530), (326, 65765), (815, 26306), (1141, 18790), (1630, 13153), (1879, 11410), (2282, 9395), (3758, 5705)]