81704840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{9413}}^1$

素因数の和:9462

約数の個数: 64

約数和(自身を含む): 216898560

約数和(自身を除く): 135193720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 31, 35, 40, 56, 62, 70, 124, 140, 155, 217, 248, 280, 310, 434, 620, 868, 1085, 1240, 1736, 2170, 4340, 8680, 9413, 18826, 37652, 47065, 65891, 75304, 94130, 131782, 188260, 263564, 291803, 329455, 376520, 527128, 583606, 658910, 1167212, 1317820, 1459015, 2042621, 2334424, 2635640, 2918030, 4085242, 5836060, 8170484, 10213105, 11672120, 16340968, 20426210, 40852420, 81704840]

約数ペア:

[(1, 81704840), (2, 40852420), (4, 20426210), (5, 16340968), (7, 11672120), (8, 10213105), (10, 8170484), (14, 5836060), (20, 4085242), (28, 2918030), (31, 2635640), (35, 2334424), (40, 2042621), (56, 1459015), (62, 1317820), (70, 1167212), (124, 658910), (140, 583606), (155, 527128), (217, 376520), (248, 329455), (280, 291803), (310, 263564), (434, 188260), (620, 131782), (868, 94130), (1085, 75304), (1240, 65891), (1736, 47065), (2170, 37652), (4340, 18826), (8680, 9413)]