21221330

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{29}}^1\times {\mathrm{433}}^1$

素因数の和:495

約数の個数: 48

約数和(自身を含む): 42887880

約数和(自身を除く): 21666550

約数列:

[1, 2, 5, 10, 13, 26, 29, 58, 65, 130, 145, 169, 290, 338, 377, 433, 754, 845, 866, 1690, 1885, 2165, 3770, 4330, 4901, 5629, 9802, 11258, 12557, 24505, 25114, 28145, 49010, 56290, 62785, 73177, 125570, 146354, 163241, 326482, 365885, 731770, 816205, 1632410, 2122133, 4244266, 10610665, 21221330]

約数ペア:

[(1, 21221330), (2, 10610665), (5, 4244266), (10, 2122133), (13, 1632410), (26, 816205), (29, 731770), (58, 365885), (65, 326482), (130, 163241), (145, 146354), (169, 125570), (290, 73177), (338, 62785), (377, 56290), (433, 49010), (754, 28145), (845, 25114), (866, 24505), (1690, 12557), (1885, 11258), (2165, 9802), (3770, 5629), (4330, 4901)]