20178560

素因数分解:

$2^7\times 5^1\times {\mathrm{41}}^1\times {\mathrm{769}}^1$

素因数の和:829

約数の個数: 64

約数和(自身を含む): 49480200

約数和(自身を除く): 29301640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 64, 80, 82, 128, 160, 164, 205, 320, 328, 410, 640, 656, 769, 820, 1312, 1538, 1640, 2624, 3076, 3280, 3845, 5248, 6152, 6560, 7690, 12304, 13120, 15380, 24608, 26240, 30760, 31529, 49216, 61520, 63058, 98432, 123040, 126116, 157645, 246080, 252232, 315290, 492160, 504464, 630580, 1008928, 1261160, 2017856, 2522320, 4035712, 5044640, 10089280, 20178560]

約数ペア:

[(1, 20178560), (2, 10089280), (4, 5044640), (5, 4035712), (8, 2522320), (10, 2017856), (16, 1261160), (20, 1008928), (32, 630580), (40, 504464), (41, 492160), (64, 315290), (80, 252232), (82, 246080), (128, 157645), (160, 126116), (164, 123040), (205, 98432), (320, 63058), (328, 61520), (410, 49216), (640, 31529), (656, 30760), (769, 26240), (820, 24608), (1312, 15380), (1538, 13120), (1640, 12304), (2624, 7690), (3076, 6560), (3280, 6152), (3845, 5248)]