21200001

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{101}}^1$

素因数の和:233

約数の個数: 32

約数和(自身を含む): 30759936

約数和(自身を除く): 9559935

約数列:

[1, 3, 31, 37, 61, 93, 101, 111, 183, 303, 1147, 1891, 2257, 3131, 3441, 3737, 5673, 6161, 6771, 9393, 11211, 18483, 69967, 115847, 190991, 209901, 227957, 347541, 572973, 683871, 7066667, 21200001]

約数ペア:

[(1, 21200001), (3, 7066667), (31, 683871), (37, 572973), (61, 347541), (93, 227957), (101, 209901), (111, 190991), (183, 115847), (303, 69967), (1147, 18483), (1891, 11211), (2257, 9393), (3131, 6771), (3441, 6161), (3737, 5673)]