81340420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{25261}}^1$

素因数の和:25300

約数の個数: 48

約数和(自身を含む): 203712768

約数和(自身を除く): 122372348

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 70, 92, 115, 140, 161, 230, 322, 460, 644, 805, 1610, 3220, 25261, 50522, 101044, 126305, 176827, 252610, 353654, 505220, 581003, 707308, 884135, 1162006, 1768270, 2324012, 2905015, 3536540, 4067021, 5810030, 8134042, 11620060, 16268084, 20335105, 40670210, 81340420]

約数ペア:

[(1, 81340420), (2, 40670210), (4, 20335105), (5, 16268084), (7, 11620060), (10, 8134042), (14, 5810030), (20, 4067021), (23, 3536540), (28, 2905015), (35, 2324012), (46, 1768270), (70, 1162006), (92, 884135), (115, 707308), (140, 581003), (161, 505220), (230, 353654), (322, 252610), (460, 176827), (644, 126305), (805, 101044), (1610, 50522), (3220, 25261)]