21165320

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{4373}}^1$

素因数の和:4406

約数の個数: 48

約数和(自身を含む): 52356780

約数和(自身を除く): 31191460

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 121, 220, 242, 440, 484, 605, 968, 1210, 2420, 4373, 4840, 8746, 17492, 21865, 34984, 43730, 48103, 87460, 96206, 174920, 192412, 240515, 384824, 481030, 529133, 962060, 1058266, 1924120, 2116532, 2645665, 4233064, 5291330, 10582660, 21165320]

約数ペア:

[(1, 21165320), (2, 10582660), (4, 5291330), (5, 4233064), (8, 2645665), (10, 2116532), (11, 1924120), (20, 1058266), (22, 962060), (40, 529133), (44, 481030), (55, 384824), (88, 240515), (110, 192412), (121, 174920), (220, 96206), (242, 87460), (440, 48103), (484, 43730), (605, 34984), (968, 21865), (1210, 17492), (2420, 8746), (4373, 4840)]