21713720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{77549}}^1$

素因数の和:77567

約数の個数: 32

約数和(自身を含む): 55836000

約数和(自身を除く): 34122280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 77549, 155098, 310196, 387745, 542843, 620392, 775490, 1085686, 1550980, 2171372, 2714215, 3101960, 4342744, 5428430, 10856860, 21713720]

約数ペア:

[(1, 21713720), (2, 10856860), (4, 5428430), (5, 4342744), (7, 3101960), (8, 2714215), (10, 2171372), (14, 1550980), (20, 1085686), (28, 775490), (35, 620392), (40, 542843), (56, 387745), (70, 310196), (140, 155098), (280, 77549)]