21002421

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{103}}^1\times {\mathrm{167}}^1$

素因数の和:321

約数の個数: 32

約数和(自身を含む): 31868928

約数和(自身を除く): 10866507

約数列:

[1, 3, 11, 33, 37, 103, 111, 167, 309, 407, 501, 1133, 1221, 1837, 3399, 3811, 5511, 6179, 11433, 17201, 18537, 41921, 51603, 67969, 125763, 189211, 203907, 567633, 636437, 1909311, 7000807, 21002421]

約数ペア:

[(1, 21002421), (3, 7000807), (11, 1909311), (33, 636437), (37, 567633), (103, 203907), (111, 189211), (167, 125763), (309, 67969), (407, 51603), (501, 41921), (1133, 18537), (1221, 17201), (1837, 11433), (3399, 6179), (3811, 5511)]