19975501

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{97}}^1$

素因数の和:221

約数の個数: 32

約数和(自身を含む): 25991168

約数和(自身を除く): 6015667

約数列:

[1, 7, 13, 31, 73, 91, 97, 217, 403, 511, 679, 949, 1261, 2263, 2821, 3007, 6643, 7081, 8827, 15841, 21049, 29419, 39091, 49567, 92053, 205933, 219511, 273637, 644371, 1536577, 2853643, 19975501]

約数ペア:

[(1, 19975501), (7, 2853643), (13, 1536577), (31, 644371), (73, 273637), (91, 219511), (97, 205933), (217, 92053), (403, 49567), (511, 39091), (679, 29419), (949, 21049), (1261, 15841), (2263, 8827), (2821, 7081), (3007, 6643)]