21507508

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{37}}^1\times {\mathrm{1201}}^1$

素因数の和:1264

約数の個数: 36

約数和(自身を含む): 42524356

約数和(自身を除く): 21016848

約数列:

[1, 2, 4, 11, 22, 37, 44, 74, 121, 148, 242, 407, 484, 814, 1201, 1628, 2402, 4477, 4804, 8954, 13211, 17908, 26422, 44437, 52844, 88874, 145321, 177748, 290642, 488807, 581284, 977614, 1955228, 5376877, 10753754, 21507508]

約数ペア:

[(1, 21507508), (2, 10753754), (4, 5376877), (11, 1955228), (22, 977614), (37, 581284), (44, 488807), (74, 290642), (121, 177748), (148, 145321), (242, 88874), (407, 52844), (484, 44437), (814, 26422), (1201, 17908), (1628, 13211), (2402, 8954), (4477, 4804)]