20008205

素因数分解:

$5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{73}}^1\times {\mathrm{191}}^1$

素因数の和:317

約数の個数: 32

約数和(自身を含む): 28643328

約数和(自身を除く): 8635123

約数列:

[1, 5, 7, 35, 41, 73, 191, 205, 287, 365, 511, 955, 1337, 1435, 2555, 2993, 6685, 7831, 13943, 14965, 20951, 39155, 54817, 69715, 97601, 104755, 274085, 488005, 571663, 2858315, 4001641, 20008205]

約数ペア:

[(1, 20008205), (5, 4001641), (7, 2858315), (35, 571663), (41, 488005), (73, 274085), (191, 104755), (205, 97601), (287, 69715), (365, 54817), (511, 39155), (955, 20951), (1337, 14965), (1435, 13943), (2555, 7831), (2993, 6685)]