81648640

素因数分解:

$2^{10}\times 5^1\times {\mathrm{37}}^1\times {\mathrm{431}}^1$

素因数の和:493

約数の個数: 88

約数和(自身を含む): 201621312

約数和(自身を除く): 119972672

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 37, 40, 64, 74, 80, 128, 148, 160, 185, 256, 296, 320, 370, 431, 512, 592, 640, 740, 862, 1024, 1184, 1280, 1480, 1724, 2155, 2368, 2560, 2960, 3448, 4310, 4736, 5120, 5920, 6896, 8620, 9472, 11840, 13792, 15947, 17240, 18944, 23680, 27584, 31894, 34480, 37888, 47360, 55168, 63788, 68960, 79735, 94720, 110336, 127576, 137920, 159470, 189440, 220672, 255152, 275840, 318940, 441344, 510304, 551680, 637880, 1020608, 1103360, 1275760, 2041216, 2206720, 2551520, 4082432, 5103040, 8164864, 10206080, 16329728, 20412160, 40824320, 81648640]

約数ペア:

[(1, 81648640), (2, 40824320), (4, 20412160), (5, 16329728), (8, 10206080), (10, 8164864), (16, 5103040), (20, 4082432), (32, 2551520), (37, 2206720), (40, 2041216), (64, 1275760), (74, 1103360), (80, 1020608), (128, 637880), (148, 551680), (160, 510304), (185, 441344), (256, 318940), (296, 275840), (320, 255152), (370, 220672), (431, 189440), (512, 159470), (592, 137920), (640, 127576), (740, 110336), (862, 94720), (1024, 79735), (1184, 68960), (1280, 63788), (1480, 55168), (1724, 47360), (2155, 37888), (2368, 34480), (2560, 31894), (2960, 27584), (3448, 23680), (4310, 18944), (4736, 17240), (5120, 15947), (5920, 13792), (6896, 11840), (8620, 9472)]