20990175

素因数分解:

$3^1\times 5^2\times {\mathrm{239}}^1\times {\mathrm{1171}}^1$

素因数の和:1423

約数の個数: 24

約数和(自身を含む): 34878720

約数和(自身を除く): 13888545

約数列:

[1, 3, 5, 15, 25, 75, 239, 717, 1171, 1195, 3513, 3585, 5855, 5975, 17565, 17925, 29275, 87825, 279869, 839607, 1399345, 4198035, 6996725, 20990175]

約数ペア:

[(1, 20990175), (3, 6996725), (5, 4198035), (15, 1399345), (25, 839607), (75, 279869), (239, 87825), (717, 29275), (1171, 17925), (1195, 17565), (3513, 5975), (3585, 5855)]