20666660

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{3433}}^1$

素因数の和:3492

約数の個数: 48

約数和(自身を含む): 50768256

約数和(自身を除く): 30101596

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 43, 70, 86, 140, 172, 215, 301, 430, 602, 860, 1204, 1505, 3010, 3433, 6020, 6866, 13732, 17165, 24031, 34330, 48062, 68660, 96124, 120155, 147619, 240310, 295238, 480620, 590476, 738095, 1033333, 1476190, 2066666, 2952380, 4133332, 5166665, 10333330, 20666660]

約数ペア:

[(1, 20666660), (2, 10333330), (4, 5166665), (5, 4133332), (7, 2952380), (10, 2066666), (14, 1476190), (20, 1033333), (28, 738095), (35, 590476), (43, 480620), (70, 295238), (86, 240310), (140, 147619), (172, 120155), (215, 96124), (301, 68660), (430, 48062), (602, 34330), (860, 24031), (1204, 17165), (1505, 13732), (3010, 6866), (3433, 6020)]