31720940

素因数分解:

$2^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{97}}^1\times {\mathrm{197}}^1$

素因数の和:386

約数の個数: 48

約数和(自身を含む): 68457312

約数和(自身を除く): 36736372

約数列:

[1, 2, 4, 5, 10, 20, 83, 97, 166, 194, 197, 332, 388, 394, 415, 485, 788, 830, 970, 985, 1660, 1940, 1970, 3940, 8051, 16102, 16351, 19109, 32204, 32702, 38218, 40255, 65404, 76436, 80510, 81755, 95545, 161020, 163510, 191090, 327020, 382180, 1586047, 3172094, 6344188, 7930235, 15860470, 31720940]

約数ペア:

[(1, 31720940), (2, 15860470), (4, 7930235), (5, 6344188), (10, 3172094), (20, 1586047), (83, 382180), (97, 327020), (166, 191090), (194, 163510), (197, 161020), (332, 95545), (388, 81755), (394, 80510), (415, 76436), (485, 65404), (788, 40255), (830, 38218), (970, 32702), (985, 32204), (1660, 19109), (1940, 16351), (1970, 16102), (3940, 8051)]