21000978861

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{1381}}^1\times {\mathrm{163517}}^1$

素因数の和:164932

約数の個数: 16

約数和(自身を含む): 28925680128

約数和(自身を除く): 7924701267

約数列:

[1, 3, 31, 93, 1381, 4143, 42811, 128433, 163517, 490551, 5069027, 15207081, 225816977, 677450931, 7000326287, 21000978861]

約数ペア:

[(1, 21000978861), (3, 7000326287), (31, 677450931), (93, 225816977), (1381, 15207081), (4143, 5069027), (42811, 490551), (128433, 163517)]