778800520

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{113}}^1\times {\mathrm{4007}}^1$

素因数の和:4174

約数の個数: 64

約数和(自身を含む): 1809371520

約数和(自身を除く): 1030571000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 113, 172, 215, 226, 344, 430, 452, 565, 860, 904, 1130, 1720, 2260, 4007, 4520, 4859, 8014, 9718, 16028, 19436, 20035, 24295, 32056, 38872, 40070, 48590, 80140, 97180, 160280, 172301, 194360, 344602, 452791, 689204, 861505, 905582, 1378408, 1723010, 1811164, 2263955, 3446020, 3622328, 4527910, 6892040, 9055820, 18111640, 19470013, 38940026, 77880052, 97350065, 155760104, 194700130, 389400260, 778800520]

約数ペア:

[(1, 778800520), (2, 389400260), (4, 194700130), (5, 155760104), (8, 97350065), (10, 77880052), (20, 38940026), (40, 19470013), (43, 18111640), (86, 9055820), (113, 6892040), (172, 4527910), (215, 3622328), (226, 3446020), (344, 2263955), (430, 1811164), (452, 1723010), (565, 1378408), (860, 905582), (904, 861505), (1130, 689204), (1720, 452791), (2260, 344602), (4007, 194360), (4520, 172301), (4859, 160280), (8014, 97180), (9718, 80140), (16028, 48590), (19436, 40070), (20035, 38872), (24295, 32056)]