123784520

素因数分解:

$2^3\times 5^1\times {\mathrm{131}}^1\times {\mathrm{23623}}^1$

素因数の和:23765

約数の個数: 32

約数和(自身を含む): 280653120

約数和(自身を除く): 156868600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 131, 262, 524, 655, 1048, 1310, 2620, 5240, 23623, 47246, 94492, 118115, 188984, 236230, 472460, 944920, 3094613, 6189226, 12378452, 15473065, 24756904, 30946130, 61892260, 123784520]

約数ペア:

[(1, 123784520), (2, 61892260), (4, 30946130), (5, 24756904), (8, 15473065), (10, 12378452), (20, 6189226), (40, 3094613), (131, 944920), (262, 472460), (524, 236230), (655, 188984), (1048, 118115), (1310, 94492), (2620, 47246), (5240, 23623)]