81259990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{37447}}^1$

素因数の和:37492

約数の個数: 32

約数和(自身を含む): 172560384

約数和(自身を除く): 91300394

約数列:

[1, 2, 5, 7, 10, 14, 31, 35, 62, 70, 155, 217, 310, 434, 1085, 2170, 37447, 74894, 187235, 262129, 374470, 524258, 1160857, 1310645, 2321714, 2621290, 5804285, 8125999, 11608570, 16251998, 40629995, 81259990]

約数ペア:

[(1, 81259990), (2, 40629995), (5, 16251998), (7, 11608570), (10, 8125999), (14, 5804285), (31, 2621290), (35, 2321714), (62, 1310645), (70, 1160857), (155, 524258), (217, 374470), (310, 262129), (434, 187235), (1085, 74894), (2170, 37447)]