21619784

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{2239}}^1$

素因数の和:2333

約数の個数: 32

約数和(自身を含む): 43545600

約数和(自身を除く): 21925816

約数列:

[1, 2, 4, 8, 17, 34, 68, 71, 136, 142, 284, 568, 1207, 2239, 2414, 4478, 4828, 8956, 9656, 17912, 38063, 76126, 152252, 158969, 304504, 317938, 635876, 1271752, 2702473, 5404946, 10809892, 21619784]

約数ペア:

[(1, 21619784), (2, 10809892), (4, 5404946), (8, 2702473), (17, 1271752), (34, 635876), (68, 317938), (71, 304504), (136, 158969), (142, 152252), (284, 76126), (568, 38063), (1207, 17912), (2239, 9656), (2414, 8956), (4478, 4828)]