20790980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{1531}}^1$

素因数の和:1644

約数の個数: 48

約数和(自身を含む): 50445696

約数和(自身を除く): 29654716

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 97, 140, 194, 388, 485, 679, 970, 1358, 1531, 1940, 2716, 3062, 3395, 6124, 6790, 7655, 10717, 13580, 15310, 21434, 30620, 42868, 53585, 107170, 148507, 214340, 297014, 594028, 742535, 1039549, 1485070, 2079098, 2970140, 4158196, 5197745, 10395490, 20790980]

約数ペア:

[(1, 20790980), (2, 10395490), (4, 5197745), (5, 4158196), (7, 2970140), (10, 2079098), (14, 1485070), (20, 1039549), (28, 742535), (35, 594028), (70, 297014), (97, 214340), (140, 148507), (194, 107170), (388, 53585), (485, 42868), (679, 30620), (970, 21434), (1358, 15310), (1531, 13580), (1940, 10717), (2716, 7655), (3062, 6790), (3395, 6124)]