21283220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{2269}}^1$

素因数の和:2352

約数の個数: 48

約数和(自身を含む): 51864960

約数和(自身を除く): 30581740

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 67, 70, 134, 140, 268, 335, 469, 670, 938, 1340, 1876, 2269, 2345, 4538, 4690, 9076, 9380, 11345, 15883, 22690, 31766, 45380, 63532, 79415, 152023, 158830, 304046, 317660, 608092, 760115, 1064161, 1520230, 2128322, 3040460, 4256644, 5320805, 10641610, 21283220]

約数ペア:

[(1, 21283220), (2, 10641610), (4, 5320805), (5, 4256644), (7, 3040460), (10, 2128322), (14, 1520230), (20, 1064161), (28, 760115), (35, 608092), (67, 317660), (70, 304046), (134, 158830), (140, 152023), (268, 79415), (335, 63532), (469, 45380), (670, 31766), (938, 22690), (1340, 15883), (1876, 11345), (2269, 9380), (2345, 9076), (4538, 4690)]