20647920

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{227}}^1\times {\mathrm{379}}^1$

素因数の和:622

約数の個数: 80

約数和(自身を含む): 64460160

約数和(自身を除く): 43812240

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 227, 240, 379, 454, 681, 758, 908, 1135, 1137, 1362, 1516, 1816, 1895, 2270, 2274, 2724, 3032, 3405, 3632, 3790, 4540, 4548, 5448, 5685, 6064, 6810, 7580, 9080, 9096, 10896, 11370, 13620, 15160, 18160, 18192, 22740, 27240, 30320, 45480, 54480, 86033, 90960, 172066, 258099, 344132, 430165, 516198, 688264, 860330, 1032396, 1290495, 1376528, 1720660, 2064792, 2580990, 3441320, 4129584, 5161980, 6882640, 10323960, 20647920]

約数ペア:

[(1, 20647920), (2, 10323960), (3, 6882640), (4, 5161980), (5, 4129584), (6, 3441320), (8, 2580990), (10, 2064792), (12, 1720660), (15, 1376528), (16, 1290495), (20, 1032396), (24, 860330), (30, 688264), (40, 516198), (48, 430165), (60, 344132), (80, 258099), (120, 172066), (227, 90960), (240, 86033), (379, 54480), (454, 45480), (681, 30320), (758, 27240), (908, 22740), (1135, 18192), (1137, 18160), (1362, 15160), (1516, 13620), (1816, 11370), (1895, 10896), (2270, 9096), (2274, 9080), (2724, 7580), (3032, 6810), (3405, 6064), (3632, 5685), (3790, 5448), (4540, 4548)]