21572551

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{937}}^1$

素因数の和:991

約数の個数: 32

約数和(自身を含む): 30256128

約数和(自身を除く): 8683577

約数列:

[1, 7, 11, 13, 23, 77, 91, 143, 161, 253, 299, 937, 1001, 1771, 2093, 3289, 6559, 10307, 12181, 21551, 23023, 72149, 85267, 133991, 150857, 237061, 280163, 937937, 1659427, 1961141, 3081793, 21572551]

約数ペア:

[(1, 21572551), (7, 3081793), (11, 1961141), (13, 1659427), (23, 937937), (77, 280163), (91, 237061), (143, 150857), (161, 133991), (253, 85267), (299, 72149), (937, 23023), (1001, 21551), (1771, 12181), (2093, 10307), (3289, 6559)]