2540440

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{211}}^1$

素因数の和:272

約数の個数: 64

約数和(自身を含む): 6716160

約数和(自身を除く): 4175720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 43, 56, 70, 86, 140, 172, 211, 215, 280, 301, 344, 422, 430, 602, 844, 860, 1055, 1204, 1477, 1505, 1688, 1720, 2110, 2408, 2954, 3010, 4220, 5908, 6020, 7385, 8440, 9073, 11816, 12040, 14770, 18146, 29540, 36292, 45365, 59080, 63511, 72584, 90730, 127022, 181460, 254044, 317555, 362920, 508088, 635110, 1270220, 2540440]

約数ペア:

[(1, 2540440), (2, 1270220), (4, 635110), (5, 508088), (7, 362920), (8, 317555), (10, 254044), (14, 181460), (20, 127022), (28, 90730), (35, 72584), (40, 63511), (43, 59080), (56, 45365), (70, 36292), (86, 29540), (140, 18146), (172, 14770), (211, 12040), (215, 11816), (280, 9073), (301, 8440), (344, 7385), (422, 6020), (430, 5908), (602, 4220), (844, 3010), (860, 2954), (1055, 2408), (1204, 2110), (1477, 1720), (1505, 1688)]