20344520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{113}}^1\times {\mathrm{643}}^1$

素因数の和:774

約数の個数: 64

約数和(自身を含む): 52859520

約数和(自身を除く): 32515000

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 113, 140, 226, 280, 452, 565, 643, 791, 904, 1130, 1286, 1582, 2260, 2572, 3164, 3215, 3955, 4501, 4520, 5144, 6328, 6430, 7910, 9002, 12860, 15820, 18004, 22505, 25720, 31640, 36008, 45010, 72659, 90020, 145318, 180040, 290636, 363295, 508613, 581272, 726590, 1017226, 1453180, 2034452, 2543065, 2906360, 4068904, 5086130, 10172260, 20344520]

約数ペア:

[(1, 20344520), (2, 10172260), (4, 5086130), (5, 4068904), (7, 2906360), (8, 2543065), (10, 2034452), (14, 1453180), (20, 1017226), (28, 726590), (35, 581272), (40, 508613), (56, 363295), (70, 290636), (113, 180040), (140, 145318), (226, 90020), (280, 72659), (452, 45010), (565, 36008), (643, 31640), (791, 25720), (904, 22505), (1130, 18004), (1286, 15820), (1582, 12860), (2260, 9002), (2572, 7910), (3164, 6430), (3215, 6328), (3955, 5144), (4501, 4520)]