20147725

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{1319}}^1$

素因数の和:1389

約数の個数: 24

約数和(自身を含む): 27498240

約数和(自身を除く): 7350515

約数列:

[1, 5, 13, 25, 47, 65, 235, 325, 611, 1175, 1319, 3055, 6595, 15275, 17147, 32975, 61993, 85735, 309965, 428675, 805909, 1549825, 4029545, 20147725]

約数ペア:

[(1, 20147725), (5, 4029545), (13, 1549825), (25, 805909), (47, 428675), (65, 309965), (235, 85735), (325, 61993), (611, 32975), (1175, 17147), (1319, 15275), (3055, 6595)]