8887780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{569}}^1$

素因数の和:660

約数の個数: 48

約数和(自身を含む): 20684160

約数和(自身を除く): 11796380

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 71, 110, 142, 220, 284, 355, 569, 710, 781, 1138, 1420, 1562, 2276, 2845, 3124, 3905, 5690, 6259, 7810, 11380, 12518, 15620, 25036, 31295, 40399, 62590, 80798, 125180, 161596, 201995, 403990, 444389, 807980, 888778, 1777556, 2221945, 4443890, 8887780]

約数ペア:

[(1, 8887780), (2, 4443890), (4, 2221945), (5, 1777556), (10, 888778), (11, 807980), (20, 444389), (22, 403990), (44, 201995), (55, 161596), (71, 125180), (110, 80798), (142, 62590), (220, 40399), (284, 31295), (355, 25036), (569, 15620), (710, 12518), (781, 11380), (1138, 7810), (1420, 6259), (1562, 5690), (2276, 3905), (2845, 3124)]