21561848

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1$

素因数の和:141

約数の個数: 128

約数和(自身を含む): 55987200

約数和(自身を除く): 34425352

約数列:

[1, 2, 4, 7, 8, 11, 14, 17, 22, 28, 29, 34, 44, 56, 58, 68, 71, 77, 88, 116, 119, 136, 142, 154, 187, 203, 232, 238, 284, 308, 319, 374, 406, 476, 493, 497, 568, 616, 638, 748, 781, 812, 952, 986, 994, 1207, 1276, 1309, 1496, 1562, 1624, 1972, 1988, 2059, 2233, 2414, 2552, 2618, 3124, 3451, 3944, 3976, 4118, 4466, 4828, 5236, 5423, 5467, 6248, 6902, 8236, 8449, 8932, 9656, 10472, 10846, 10934, 13277, 13804, 14413, 16472, 16898, 17864, 21692, 21868, 22649, 26554, 27608, 28826, 33796, 35003, 37961, 43384, 43736, 45298, 53108, 57652, 67592, 70006, 75922, 90596, 92939, 106216, 115304, 140012, 151844, 158543, 181192, 185878, 245021, 280024, 303688, 317086, 371756, 385033, 490042, 634172, 743512, 770066, 980084, 1268344, 1540132, 1960168, 2695231, 3080264, 5390462, 10780924, 21561848]

約数ペア:

[(1, 21561848), (2, 10780924), (4, 5390462), (7, 3080264), (8, 2695231), (11, 1960168), (14, 1540132), (17, 1268344), (22, 980084), (28, 770066), (29, 743512), (34, 634172), (44, 490042), (56, 385033), (58, 371756), (68, 317086), (71, 303688), (77, 280024), (88, 245021), (116, 185878), (119, 181192), (136, 158543), (142, 151844), (154, 140012), (187, 115304), (203, 106216), (232, 92939), (238, 90596), (284, 75922), (308, 70006), (319, 67592), (374, 57652), (406, 53108), (476, 45298), (493, 43736), (497, 43384), (568, 37961), (616, 35003), (638, 33796), (748, 28826), (781, 27608), (812, 26554), (952, 22649), (986, 21868), (994, 21692), (1207, 17864), (1276, 16898), (1309, 16472), (1496, 14413), (1562, 13804), (1624, 13277), (1972, 10934), (1988, 10846), (2059, 10472), (2233, 9656), (2414, 8932), (2552, 8449), (2618, 8236), (3124, 6902), (3451, 6248), (3944, 5467), (3976, 5423), (4118, 5236), (4466, 4828)]