21244888

素因数分解:

$2^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{487}}^1$

素因数の和:560

約数の個数: 64

約数和(自身を含む): 49190400

約数和(自身を除く): 27945512

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 38, 41, 56, 76, 82, 133, 152, 164, 266, 287, 328, 487, 532, 574, 779, 974, 1064, 1148, 1558, 1948, 2296, 3116, 3409, 3896, 5453, 6232, 6818, 9253, 10906, 13636, 18506, 19967, 21812, 27272, 37012, 39934, 43624, 64771, 74024, 79868, 129542, 139769, 159736, 259084, 279538, 379373, 518168, 559076, 758746, 1118152, 1517492, 2655611, 3034984, 5311222, 10622444, 21244888]

約数ペア:

[(1, 21244888), (2, 10622444), (4, 5311222), (7, 3034984), (8, 2655611), (14, 1517492), (19, 1118152), (28, 758746), (38, 559076), (41, 518168), (56, 379373), (76, 279538), (82, 259084), (133, 159736), (152, 139769), (164, 129542), (266, 79868), (287, 74024), (328, 64771), (487, 43624), (532, 39934), (574, 37012), (779, 27272), (974, 21812), (1064, 19967), (1148, 18506), (1558, 13636), (1948, 10906), (2296, 9253), (3116, 6818), (3409, 6232), (3896, 5453)]