20997240

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{15907}}^1$

素因数の和:15932

約数の個数: 64

約数和(自身を含む): 68722560

約数和(自身を除く): 47725320

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 20, 22, 24, 30, 33, 40, 44, 55, 60, 66, 88, 110, 120, 132, 165, 220, 264, 330, 440, 660, 1320, 15907, 31814, 47721, 63628, 79535, 95442, 127256, 159070, 174977, 190884, 238605, 318140, 349954, 381768, 477210, 524931, 636280, 699908, 874885, 954420, 1049862, 1399816, 1749770, 1908840, 2099724, 2624655, 3499540, 4199448, 5249310, 6999080, 10498620, 20997240]

約数ペア:

[(1, 20997240), (2, 10498620), (3, 6999080), (4, 5249310), (5, 4199448), (6, 3499540), (8, 2624655), (10, 2099724), (11, 1908840), (12, 1749770), (15, 1399816), (20, 1049862), (22, 954420), (24, 874885), (30, 699908), (33, 636280), (40, 524931), (44, 477210), (55, 381768), (60, 349954), (66, 318140), (88, 238605), (110, 190884), (120, 174977), (132, 159070), (165, 127256), (220, 95442), (264, 79535), (330, 63628), (440, 47721), (660, 31814), (1320, 15907)]