28181555

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{139}}^1$

素因数の和:251

約数の個数: 32

約数和(自身を含む): 37255680

約数和(自身を除く): 9074125

約数列:

[1, 5, 23, 41, 43, 115, 139, 205, 215, 695, 943, 989, 1763, 3197, 4715, 4945, 5699, 5977, 8815, 15985, 28495, 29885, 40549, 131077, 137471, 202745, 245057, 655385, 687355, 1225285, 5636311, 28181555]

約数ペア:

[(1, 28181555), (5, 5636311), (23, 1225285), (41, 687355), (43, 655385), (115, 245057), (139, 202745), (205, 137471), (215, 131077), (695, 40549), (943, 29885), (989, 28495), (1763, 15985), (3197, 8815), (4715, 5977), (4945, 5699)]