21657920

素因数分解:

$2^6\times 5^1\times {\mathrm{53}}^1\times {\mathrm{1277}}^1$

素因数の和:1347

約数の個数: 56

約数和(自身を含む): 52587144

約数和(自身を除く): 30929224

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 53, 64, 80, 106, 160, 212, 265, 320, 424, 530, 848, 1060, 1277, 1696, 2120, 2554, 3392, 4240, 5108, 6385, 8480, 10216, 12770, 16960, 20432, 25540, 40864, 51080, 67681, 81728, 102160, 135362, 204320, 270724, 338405, 408640, 541448, 676810, 1082896, 1353620, 2165792, 2707240, 4331584, 5414480, 10828960, 21657920]

約数ペア:

[(1, 21657920), (2, 10828960), (4, 5414480), (5, 4331584), (8, 2707240), (10, 2165792), (16, 1353620), (20, 1082896), (32, 676810), (40, 541448), (53, 408640), (64, 338405), (80, 270724), (106, 204320), (160, 135362), (212, 102160), (265, 81728), (320, 67681), (424, 51080), (530, 40864), (848, 25540), (1060, 20432), (1277, 16960), (1696, 12770), (2120, 10216), (2554, 8480), (3392, 6385), (4240, 5108)]