21490910

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{61}}^1\times {\mathrm{719}}^1$

素因数の和:801

約数の個数: 48

約数和(自身を含む): 45800640

約数和(自身を除く): 24309730

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 61, 70, 98, 122, 245, 305, 427, 490, 610, 719, 854, 1438, 2135, 2989, 3595, 4270, 5033, 5978, 7190, 10066, 14945, 25165, 29890, 35231, 43859, 50330, 70462, 87718, 176155, 219295, 307013, 352310, 438590, 614026, 1535065, 2149091, 3070130, 4298182, 10745455, 21490910]

約数ペア:

[(1, 21490910), (2, 10745455), (5, 4298182), (7, 3070130), (10, 2149091), (14, 1535065), (35, 614026), (49, 438590), (61, 352310), (70, 307013), (98, 219295), (122, 176155), (245, 87718), (305, 70462), (427, 50330), (490, 43859), (610, 35231), (719, 29890), (854, 25165), (1438, 14945), (2135, 10066), (2989, 7190), (3595, 5978), (4270, 5033)]