20129991

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{587}}^1$

素因数の和:691

約数の個数: 32

約数和(自身を含む): 32514048

約数和(自身を除く): 12384057

約数列:

[1, 3, 7, 21, 23, 69, 71, 161, 213, 483, 497, 587, 1491, 1633, 1761, 4109, 4899, 11431, 12327, 13501, 34293, 40503, 41677, 94507, 125031, 283521, 291739, 875217, 958571, 2875713, 6709997, 20129991]

約数ペア:

[(1, 20129991), (3, 6709997), (7, 2875713), (21, 958571), (23, 875217), (69, 291739), (71, 283521), (161, 125031), (213, 94507), (483, 41677), (497, 40503), (587, 34293), (1491, 13501), (1633, 12327), (1761, 11431), (4109, 4899)]