21684040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{1801}}^1$

素因数の和:1862

約数の個数: 64

約数和(自身を含む): 57087360

約数和(自身を除く): 35403320

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 43, 56, 70, 86, 140, 172, 215, 280, 301, 344, 430, 602, 860, 1204, 1505, 1720, 1801, 2408, 3010, 3602, 6020, 7204, 9005, 12040, 12607, 14408, 18010, 25214, 36020, 50428, 63035, 72040, 77443, 100856, 126070, 154886, 252140, 309772, 387215, 504280, 542101, 619544, 774430, 1084202, 1548860, 2168404, 2710505, 3097720, 4336808, 5421010, 10842020, 21684040]

約数ペア:

[(1, 21684040), (2, 10842020), (4, 5421010), (5, 4336808), (7, 3097720), (8, 2710505), (10, 2168404), (14, 1548860), (20, 1084202), (28, 774430), (35, 619544), (40, 542101), (43, 504280), (56, 387215), (70, 309772), (86, 252140), (140, 154886), (172, 126070), (215, 100856), (280, 77443), (301, 72040), (344, 63035), (430, 50428), (602, 36020), (860, 25214), (1204, 18010), (1505, 14408), (1720, 12607), (1801, 12040), (2408, 9005), (3010, 7204), (3602, 6020)]