21486212

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{103}}^1\times {\mathrm{431}}^1$

素因数の和:560

約数の個数: 36

約数和(自身を含む): 41827968

約数和(自身を除く): 20341756

約数列:

[1, 2, 4, 11, 22, 44, 103, 121, 206, 242, 412, 431, 484, 862, 1133, 1724, 2266, 4532, 4741, 9482, 12463, 18964, 24926, 44393, 49852, 52151, 88786, 104302, 177572, 208604, 488323, 976646, 1953292, 5371553, 10743106, 21486212]

約数ペア:

[(1, 21486212), (2, 10743106), (4, 5371553), (11, 1953292), (22, 976646), (44, 488323), (103, 208604), (121, 177572), (206, 104302), (242, 88786), (412, 52151), (431, 49852), (484, 44393), (862, 24926), (1133, 18964), (1724, 12463), (2266, 9482), (4532, 4741)]