21875560

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{11161}}^1$

素因数の和:11186

約数の個数: 48

約数和(自身を含む): 57261060

約数和(自身を除く): 35385500

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 11161, 22322, 44644, 55805, 78127, 89288, 111610, 156254, 223220, 312508, 390635, 446440, 546889, 625016, 781270, 1093778, 1562540, 2187556, 2734445, 3125080, 4375112, 5468890, 10937780, 21875560]

約数ペア:

[(1, 21875560), (2, 10937780), (4, 5468890), (5, 4375112), (7, 3125080), (8, 2734445), (10, 2187556), (14, 1562540), (20, 1093778), (28, 781270), (35, 625016), (40, 546889), (49, 446440), (56, 390635), (70, 312508), (98, 223220), (140, 156254), (196, 111610), (245, 89288), (280, 78127), (392, 55805), (490, 44644), (980, 22322), (1960, 11161)]