19907978

素因数分解:

$2^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{67}}^1\times {\mathrm{109}}^1$

素因数の和:254

約数の個数: 32

約数和(自身を含む): 32313600

約数和(自身を除く): 12405622

約数列:

[1, 2, 29, 47, 58, 67, 94, 109, 134, 218, 1363, 1943, 2726, 3149, 3161, 3886, 5123, 6298, 6322, 7303, 10246, 14606, 91321, 148567, 182642, 211787, 297134, 343241, 423574, 686482, 9953989, 19907978]

約数ペア:

[(1, 19907978), (2, 9953989), (29, 686482), (47, 423574), (58, 343241), (67, 297134), (94, 211787), (109, 182642), (134, 148567), (218, 91321), (1363, 14606), (1943, 10246), (2726, 7303), (3149, 6322), (3161, 6298), (3886, 5123)]