20697920

素因数分解:

$2^6\times 5^1\times {\mathrm{71}}^1\times {\mathrm{911}}^1$

素因数の和:999

約数の個数: 56

約数和(自身を含む): 50035968

約数和(自身を除く): 29338048

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 71, 80, 142, 160, 284, 320, 355, 568, 710, 911, 1136, 1420, 1822, 2272, 2840, 3644, 4544, 4555, 5680, 7288, 9110, 11360, 14576, 18220, 22720, 29152, 36440, 58304, 64681, 72880, 129362, 145760, 258724, 291520, 323405, 517448, 646810, 1034896, 1293620, 2069792, 2587240, 4139584, 5174480, 10348960, 20697920]

約数ペア:

[(1, 20697920), (2, 10348960), (4, 5174480), (5, 4139584), (8, 2587240), (10, 2069792), (16, 1293620), (20, 1034896), (32, 646810), (40, 517448), (64, 323405), (71, 291520), (80, 258724), (142, 145760), (160, 129362), (284, 72880), (320, 64681), (355, 58304), (568, 36440), (710, 29152), (911, 22720), (1136, 18220), (1420, 14576), (1822, 11360), (2272, 9110), (2840, 7288), (3644, 5680), (4544, 4555)]