65439980

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{1619}}^1$

素因数の和:1718

約数の個数: 48

約数和(自身を含む): 143700480

約数和(自身を除く): 78260500

約数列:

[1, 2, 4, 5, 10, 20, 43, 47, 86, 94, 172, 188, 215, 235, 430, 470, 860, 940, 1619, 2021, 3238, 4042, 6476, 8084, 8095, 10105, 16190, 20210, 32380, 40420, 69617, 76093, 139234, 152186, 278468, 304372, 348085, 380465, 696170, 760930, 1392340, 1521860, 3271999, 6543998, 13087996, 16359995, 32719990, 65439980]

約数ペア:

[(1, 65439980), (2, 32719990), (4, 16359995), (5, 13087996), (10, 6543998), (20, 3271999), (43, 1521860), (47, 1392340), (86, 760930), (94, 696170), (172, 380465), (188, 348085), (215, 304372), (235, 278468), (430, 152186), (470, 139234), (860, 76093), (940, 69617), (1619, 40420), (2021, 32380), (3238, 20210), (4042, 16190), (6476, 10105), (8084, 8095)]