20980955

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{223}}^1\times {\mathrm{607}}^1$

素因数の和:866

約数の個数: 16

約数和(自身を含む): 26148864

約数和(自身を除く): 5167909

約数列:

[1, 5, 31, 155, 223, 607, 1115, 3035, 6913, 18817, 34565, 94085, 135361, 676805, 4196191, 20980955]

約数ペア:

[(1, 20980955), (5, 4196191), (31, 676805), (155, 135361), (223, 94085), (607, 34565), (1115, 18817), (3035, 6913)]