7802780

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^2\times {\mathrm{211}}^1$

素因数の和:306

約数の個数: 36

約数和(自身を含む): 16855272

約数和(自身を除く): 9052492

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 211, 215, 422, 430, 844, 860, 1055, 1849, 2110, 3698, 4220, 7396, 9073, 9245, 18146, 18490, 36292, 36980, 45365, 90730, 181460, 390139, 780278, 1560556, 1950695, 3901390, 7802780]

約数ペア:

[(1, 7802780), (2, 3901390), (4, 1950695), (5, 1560556), (10, 780278), (20, 390139), (43, 181460), (86, 90730), (172, 45365), (211, 36980), (215, 36292), (422, 18490), (430, 18146), (844, 9245), (860, 9073), (1055, 7396), (1849, 4220), (2110, 3698)]