21155925

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{59}}^1\times {\mathrm{683}}^1$

素因数の和:762

約数の個数: 48

約数和(自身を含む): 40711680

約数和(自身を除く): 19555755

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 59, 75, 105, 175, 177, 295, 413, 525, 683, 885, 1239, 1475, 2049, 2065, 3415, 4425, 4781, 6195, 10245, 10325, 14343, 17075, 23905, 30975, 40297, 51225, 71715, 119525, 120891, 201485, 282079, 358575, 604455, 846237, 1007425, 1410395, 3022275, 4231185, 7051975, 21155925]

約数ペア:

[(1, 21155925), (3, 7051975), (5, 4231185), (7, 3022275), (15, 1410395), (21, 1007425), (25, 846237), (35, 604455), (59, 358575), (75, 282079), (105, 201485), (175, 120891), (177, 119525), (295, 71715), (413, 51225), (525, 40297), (683, 30975), (885, 23905), (1239, 17075), (1475, 14343), (2049, 10325), (2065, 10245), (3415, 6195), (4425, 4781)]