21957100

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{19961}}^1$

素因数の和:19986

約数の個数: 36

約数和(自身を含む): 51981048

約数和(自身を除く): 30023948

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 100, 110, 220, 275, 550, 1100, 19961, 39922, 79844, 99805, 199610, 219571, 399220, 439142, 499025, 878284, 998050, 1097855, 1996100, 2195710, 4391420, 5489275, 10978550, 21957100]

約数ペア:

[(1, 21957100), (2, 10978550), (4, 5489275), (5, 4391420), (10, 2195710), (11, 1996100), (20, 1097855), (22, 998050), (25, 878284), (44, 499025), (50, 439142), (55, 399220), (100, 219571), (110, 199610), (220, 99805), (275, 79844), (550, 39922), (1100, 19961)]