20910100

素因数分解:

$2^2\times 5^2\times {\mathrm{211}}^1\times {\mathrm{991}}^1$

素因数の和:1216

約数の個数: 36

約数和(自身を含む): 45635968

約数和(自身を除く): 24725868

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 211, 422, 844, 991, 1055, 1982, 2110, 3964, 4220, 4955, 5275, 9910, 10550, 19820, 21100, 24775, 49550, 99100, 209101, 418202, 836404, 1045505, 2091010, 4182020, 5227525, 10455050, 20910100]

約数ペア:

[(1, 20910100), (2, 10455050), (4, 5227525), (5, 4182020), (10, 2091010), (20, 1045505), (25, 836404), (50, 418202), (100, 209101), (211, 99100), (422, 49550), (844, 24775), (991, 21100), (1055, 19820), (1982, 10550), (2110, 9910), (3964, 5275), (4220, 4955)]