21000867

素因数分解:

$3^1\times {\mathrm{37}}^1\times {\mathrm{137}}^1\times {\mathrm{1381}}^1$

素因数の和:1558

約数の個数: 16

約数和(自身を含む): 28988832

約数和(自身を除く): 7987965

約数列:

[1, 3, 37, 111, 137, 411, 1381, 4143, 5069, 15207, 51097, 153291, 189197, 567591, 7000289, 21000867]

約数ペア:

[(1, 21000867), (3, 7000289), (37, 567591), (111, 189197), (137, 153291), (411, 51097), (1381, 15207), (4143, 5069)]