21228020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{2053}}^1$

素因数の和:2120

約数の個数: 48

約数和(自身を含む): 49690368

約数和(自身を除く): 28462348

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 47, 55, 94, 110, 188, 220, 235, 470, 517, 940, 1034, 2053, 2068, 2585, 4106, 5170, 8212, 10265, 10340, 20530, 22583, 41060, 45166, 90332, 96491, 112915, 192982, 225830, 385964, 451660, 482455, 964910, 1061401, 1929820, 2122802, 4245604, 5307005, 10614010, 21228020]

約数ペア:

[(1, 21228020), (2, 10614010), (4, 5307005), (5, 4245604), (10, 2122802), (11, 1929820), (20, 1061401), (22, 964910), (44, 482455), (47, 451660), (55, 385964), (94, 225830), (110, 192982), (188, 112915), (220, 96491), (235, 90332), (470, 45166), (517, 41060), (940, 22583), (1034, 20530), (2053, 10340), (2068, 10265), (2585, 8212), (4106, 5170)]