21990100

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{19991}}^1$

素因数の和:20016

約数の個数: 36

約数和(自身を含む): 52059168

約数和(自身を除く): 30069068

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 100, 110, 220, 275, 550, 1100, 19991, 39982, 79964, 99955, 199910, 219901, 399820, 439802, 499775, 879604, 999550, 1099505, 1999100, 2199010, 4398020, 5497525, 10995050, 21990100]

約数ペア:

[(1, 21990100), (2, 10995050), (4, 5497525), (5, 4398020), (10, 2199010), (11, 1999100), (20, 1099505), (22, 999550), (25, 879604), (44, 499775), (50, 439802), (55, 399820), (100, 219901), (110, 199910), (220, 99955), (275, 79964), (550, 39982), (1100, 19991)]