21025480

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{1231}}^1$

素因数の和:1310

約数の個数: 64

約数和(自身を含む): 54996480

約数和(自身を除く): 33971000

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 61, 70, 122, 140, 244, 280, 305, 427, 488, 610, 854, 1220, 1231, 1708, 2135, 2440, 2462, 3416, 4270, 4924, 6155, 8540, 8617, 9848, 12310, 17080, 17234, 24620, 34468, 43085, 49240, 68936, 75091, 86170, 150182, 172340, 300364, 344680, 375455, 525637, 600728, 750910, 1051274, 1501820, 2102548, 2628185, 3003640, 4205096, 5256370, 10512740, 21025480]

約数ペア:

[(1, 21025480), (2, 10512740), (4, 5256370), (5, 4205096), (7, 3003640), (8, 2628185), (10, 2102548), (14, 1501820), (20, 1051274), (28, 750910), (35, 600728), (40, 525637), (56, 375455), (61, 344680), (70, 300364), (122, 172340), (140, 150182), (244, 86170), (280, 75091), (305, 68936), (427, 49240), (488, 43085), (610, 34468), (854, 24620), (1220, 17234), (1231, 17080), (1708, 12310), (2135, 9848), (2440, 8617), (2462, 8540), (3416, 6155), (4270, 4924)]