221513075

素因数分解:

$5^2\times 7^2\times {\mathrm{211}}^1\times {\mathrm{857}}^1$

素因数の和:1092

約数の個数: 36

約数和(自身を含む): 321410232

約数和(自身を除く): 99897157

約数列:

[1, 5, 7, 25, 35, 49, 175, 211, 245, 857, 1055, 1225, 1477, 4285, 5275, 5999, 7385, 10339, 21425, 29995, 36925, 41993, 51695, 149975, 180827, 209965, 258475, 904135, 1049825, 1265789, 4520675, 6328945, 8860523, 31644725, 44302615, 221513075]

約数ペア:

[(1, 221513075), (5, 44302615), (7, 31644725), (25, 8860523), (35, 6328945), (49, 4520675), (175, 1265789), (211, 1049825), (245, 904135), (857, 258475), (1055, 209965), (1225, 180827), (1477, 149975), (4285, 51695), (5275, 41993), (5999, 36925), (7385, 29995), (10339, 21425)]