21068960

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{11971}}^1$

素因数の和:11997

約数の個数: 48

約数和(自身を含む): 54304992

約数和(自身を除く): 33236032

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 110, 160, 176, 220, 352, 440, 880, 1760, 11971, 23942, 47884, 59855, 95768, 119710, 131681, 191536, 239420, 263362, 383072, 478840, 526724, 658405, 957680, 1053448, 1316810, 1915360, 2106896, 2633620, 4213792, 5267240, 10534480, 21068960]

約数ペア:

[(1, 21068960), (2, 10534480), (4, 5267240), (5, 4213792), (8, 2633620), (10, 2106896), (11, 1915360), (16, 1316810), (20, 1053448), (22, 957680), (32, 658405), (40, 526724), (44, 478840), (55, 383072), (80, 263362), (88, 239420), (110, 191536), (160, 131681), (176, 119710), (220, 95768), (352, 59855), (440, 47884), (880, 23942), (1760, 11971)]