209213487

素因数分解:

$3^2\times 7^2\times {\mathrm{139}}^1\times {\mathrm{3413}}^1$

素因数の和:3572

約数の個数: 36

約数和(自身を含む): 354168360

約数和(自身を除く): 144954873

約数列:

[1, 3, 7, 9, 21, 49, 63, 139, 147, 417, 441, 973, 1251, 2919, 3413, 6811, 8757, 10239, 20433, 23891, 30717, 61299, 71673, 167237, 215019, 474407, 501711, 1423221, 1505133, 3320849, 4269663, 9962547, 23245943, 29887641, 69737829, 209213487]

約数ペア:

[(1, 209213487), (3, 69737829), (7, 29887641), (9, 23245943), (21, 9962547), (49, 4269663), (63, 3320849), (139, 1505133), (147, 1423221), (417, 501711), (441, 474407), (973, 215019), (1251, 167237), (2919, 71673), (3413, 61299), (6811, 30717), (8757, 23891), (10239, 20433)]