21211359

素因数分解:

$3^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{107}}^1$

素因数の和:176

約数の個数: 48

約数和(自身を含む): 34152192

約数和(自身を除く): 12940833

約数列:

[1, 3, 13, 17, 23, 39, 51, 69, 107, 169, 221, 299, 321, 391, 507, 663, 897, 1173, 1391, 1819, 2461, 2873, 3887, 4173, 5083, 5457, 7383, 8619, 11661, 15249, 18083, 23647, 31993, 41837, 54249, 66079, 70941, 95979, 125511, 198237, 307411, 415909, 543881, 922233, 1247727, 1631643, 7070453, 21211359]

約数ペア:

[(1, 21211359), (3, 7070453), (13, 1631643), (17, 1247727), (23, 922233), (39, 543881), (51, 415909), (69, 307411), (107, 198237), (169, 125511), (221, 95979), (299, 70941), (321, 66079), (391, 54249), (507, 41837), (663, 31993), (897, 23647), (1173, 18083), (1391, 15249), (1819, 11661), (2461, 8619), (2873, 7383), (3887, 5457), (4173, 5083)]