20390216

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{419}}^1$

素因数の和:522

約数の個数: 64

約数和(自身を含む): 48384000

約数和(自身を除く): 27993784

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 44, 56, 77, 79, 88, 154, 158, 308, 316, 419, 553, 616, 632, 838, 869, 1106, 1676, 1738, 2212, 2933, 3352, 3476, 4424, 4609, 5866, 6083, 6952, 9218, 11732, 12166, 18436, 23464, 24332, 32263, 33101, 36872, 48664, 64526, 66202, 129052, 132404, 231707, 258104, 264808, 364111, 463414, 728222, 926828, 1456444, 1853656, 2548777, 2912888, 5097554, 10195108, 20390216]

約数ペア:

[(1, 20390216), (2, 10195108), (4, 5097554), (7, 2912888), (8, 2548777), (11, 1853656), (14, 1456444), (22, 926828), (28, 728222), (44, 463414), (56, 364111), (77, 264808), (79, 258104), (88, 231707), (154, 132404), (158, 129052), (308, 66202), (316, 64526), (419, 48664), (553, 36872), (616, 33101), (632, 32263), (838, 24332), (869, 23464), (1106, 18436), (1676, 12166), (1738, 11732), (2212, 9218), (2933, 6952), (3352, 6083), (3476, 5866), (4424, 4609)]