215513221

素因数分解:

$7^2\times {\mathrm{11}}^2\times {\mathrm{163}}^1\times {\mathrm{223}}^1$

素因数の和:422

約数の個数: 36

約数和(自身を含む): 278495616

約数和(自身を除く): 62982395

約数列:

[1, 7, 11, 49, 77, 121, 163, 223, 539, 847, 1141, 1561, 1793, 2453, 5929, 7987, 10927, 12551, 17171, 19723, 26983, 36349, 87857, 120197, 138061, 188881, 254443, 399839, 966427, 1322167, 1781101, 2798873, 4398229, 19592111, 30787603, 215513221]

約数ペア:

[(1, 215513221), (7, 30787603), (11, 19592111), (49, 4398229), (77, 2798873), (121, 1781101), (163, 1322167), (223, 966427), (539, 399839), (847, 254443), (1141, 188881), (1561, 138061), (1793, 120197), (2453, 87857), (5929, 36349), (7987, 26983), (10927, 19723), (12551, 17171)]