21013972

素因数分解:

$2^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{337}}^1$

素因数の和:496

約数の個数: 48

約数和(自身を含む): 44972928

約数和(自身を除く): 23958956

約数列:

[1, 2, 4, 7, 14, 17, 28, 34, 68, 119, 131, 238, 262, 337, 476, 524, 674, 917, 1348, 1834, 2227, 2359, 3668, 4454, 4718, 5729, 8908, 9436, 11458, 15589, 22916, 31178, 40103, 44147, 62356, 80206, 88294, 160412, 176588, 309029, 618058, 750499, 1236116, 1500998, 3001996, 5253493, 10506986, 21013972]

約数ペア:

[(1, 21013972), (2, 10506986), (4, 5253493), (7, 3001996), (14, 1500998), (17, 1236116), (28, 750499), (34, 618058), (68, 309029), (119, 176588), (131, 160412), (238, 88294), (262, 80206), (337, 62356), (476, 44147), (524, 40103), (674, 31178), (917, 22916), (1348, 15589), (1834, 11458), (2227, 9436), (2359, 8908), (3668, 5729), (4454, 4718)]