21273872

素因数分解:

$2^4\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{307}}^1$

素因数の和:447

約数の個数: 40

約数和(自身を含む): 42622272

約数和(自身を除く): 21348400

約数列:

[1, 2, 4, 8, 16, 61, 71, 122, 142, 244, 284, 307, 488, 568, 614, 976, 1136, 1228, 2456, 4331, 4912, 8662, 17324, 18727, 21797, 34648, 37454, 43594, 69296, 74908, 87188, 149816, 174376, 299632, 348752, 1329617, 2659234, 5318468, 10636936, 21273872]

約数ペア:

[(1, 21273872), (2, 10636936), (4, 5318468), (8, 2659234), (16, 1329617), (61, 348752), (71, 299632), (122, 174376), (142, 149816), (244, 87188), (284, 74908), (307, 69296), (488, 43594), (568, 37454), (614, 34648), (976, 21797), (1136, 18727), (1228, 17324), (2456, 8662), (4331, 4912)]