20884325

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{571}}^1$

素因数の和:618

約数の個数: 48

約数和(自身を含む): 34045440

約数和(自身を除く): 13161115

約数列:

[1, 5, 7, 11, 19, 25, 35, 55, 77, 95, 133, 175, 209, 275, 385, 475, 571, 665, 1045, 1463, 1925, 2855, 3325, 3997, 5225, 6281, 7315, 10849, 14275, 19985, 31405, 36575, 43967, 54245, 75943, 99925, 119339, 157025, 219835, 271225, 379715, 596695, 835373, 1099175, 1898575, 2983475, 4176865, 20884325]

約数ペア:

[(1, 20884325), (5, 4176865), (7, 2983475), (11, 1898575), (19, 1099175), (25, 835373), (35, 596695), (55, 379715), (77, 271225), (95, 219835), (133, 157025), (175, 119339), (209, 99925), (275, 75943), (385, 54245), (475, 43967), (571, 36575), (665, 31405), (1045, 19985), (1463, 14275), (1925, 10849), (2855, 7315), (3325, 6281), (3997, 5225)]