21221265821

素因数分解:

$7^1\times {\mathrm{89}}^1\times {\mathrm{103}}^1\times {\mathrm{223}}^1\times {\mathrm{1483}}^1$

素因数の和:1905

約数の個数: 32

約数和(自身を含む): 24891310080

約数和(自身を除く): 3670044259

約数列:

[1, 7, 89, 103, 223, 623, 721, 1483, 1561, 9167, 10381, 19847, 22969, 64169, 131987, 138929, 152749, 160783, 330709, 923909, 1069243, 2044241, 2314963, 13594661, 14309687, 29433101, 34063027, 95162627, 206031707, 238441189, 3031609403, 21221265821]

約数ペア:

[(1, 21221265821), (7, 3031609403), (89, 238441189), (103, 206031707), (223, 95162627), (623, 34063027), (721, 29433101), (1483, 14309687), (1561, 13594661), (9167, 2314963), (10381, 2044241), (19847, 1069243), (22969, 923909), (64169, 330709), (131987, 160783), (138929, 152749)]