19888725

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{821}}^1$

素因数の和:870

約数の個数: 48

約数和(自身を含む): 36694080

約数和(自身を除く): 16805355

約数列:

[1, 3, 5, 15, 17, 19, 25, 51, 57, 75, 85, 95, 255, 285, 323, 425, 475, 821, 969, 1275, 1425, 1615, 2463, 4105, 4845, 8075, 12315, 13957, 15599, 20525, 24225, 41871, 46797, 61575, 69785, 77995, 209355, 233985, 265183, 348925, 389975, 795549, 1046775, 1169925, 1325915, 3977745, 6629575, 19888725]

約数ペア:

[(1, 19888725), (3, 6629575), (5, 3977745), (15, 1325915), (17, 1169925), (19, 1046775), (25, 795549), (51, 389975), (57, 348925), (75, 265183), (85, 233985), (95, 209355), (255, 77995), (285, 69785), (323, 61575), (425, 46797), (475, 41871), (821, 24225), (969, 20525), (1275, 15599), (1425, 13957), (1615, 12315), (2463, 8075), (4105, 4845)]