18961040

素因数分解:

$2^4\times 5^1\times 7^3\times {\mathrm{691}}^1$

素因数の和:725

約数の個数: 80

約数和(自身を含む): 51484800

約数和(自身を除く): 32523760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 343, 392, 490, 560, 686, 691, 784, 980, 1372, 1382, 1715, 1960, 2744, 2764, 3430, 3455, 3920, 4837, 5488, 5528, 6860, 6910, 9674, 11056, 13720, 13820, 19348, 24185, 27440, 27640, 33859, 38696, 48370, 55280, 67718, 77392, 96740, 135436, 169295, 193480, 237013, 270872, 338590, 386960, 474026, 541744, 677180, 948052, 1185065, 1354360, 1896104, 2370130, 2708720, 3792208, 4740260, 9480520, 18961040]

約数ペア:

[(1, 18961040), (2, 9480520), (4, 4740260), (5, 3792208), (7, 2708720), (8, 2370130), (10, 1896104), (14, 1354360), (16, 1185065), (20, 948052), (28, 677180), (35, 541744), (40, 474026), (49, 386960), (56, 338590), (70, 270872), (80, 237013), (98, 193480), (112, 169295), (140, 135436), (196, 96740), (245, 77392), (280, 67718), (343, 55280), (392, 48370), (490, 38696), (560, 33859), (686, 27640), (691, 27440), (784, 24185), (980, 19348), (1372, 13820), (1382, 13720), (1715, 11056), (1960, 9674), (2744, 6910), (2764, 6860), (3430, 5528), (3455, 5488), (3920, 4837)]