21219978

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{1231}}^1$

素因数の和:1279

約数の個数: 48

約数和(自身を含む): 48698496

約数和(自身を除く): 27478518

約数列:

[1, 2, 3, 6, 13, 17, 26, 34, 39, 51, 78, 102, 169, 221, 338, 442, 507, 663, 1014, 1231, 1326, 2462, 2873, 3693, 5746, 7386, 8619, 16003, 17238, 20927, 32006, 41854, 48009, 62781, 96018, 125562, 208039, 272051, 416078, 544102, 624117, 816153, 1248234, 1632306, 3536663, 7073326, 10609989, 21219978]

約数ペア:

[(1, 21219978), (2, 10609989), (3, 7073326), (6, 3536663), (13, 1632306), (17, 1248234), (26, 816153), (34, 624117), (39, 544102), (51, 416078), (78, 272051), (102, 208039), (169, 125562), (221, 96018), (338, 62781), (442, 48009), (507, 41854), (663, 32006), (1014, 20927), (1231, 17238), (1326, 16003), (2462, 8619), (2873, 7386), (3693, 5746)]