21067720

素因数分解:

$2^3\times 5^1\times {\mathrm{59}}^1\times {\mathrm{79}}^1\times {\mathrm{113}}^1$

素因数の和:262

約数の個数: 64

約数和(自身を含む): 49248000

約数和(自身を除く): 28180280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 59, 79, 113, 118, 158, 226, 236, 295, 316, 395, 452, 472, 565, 590, 632, 790, 904, 1130, 1180, 1580, 2260, 2360, 3160, 4520, 4661, 6667, 8927, 9322, 13334, 17854, 18644, 23305, 26668, 33335, 35708, 37288, 44635, 46610, 53336, 66670, 71416, 89270, 93220, 133340, 178540, 186440, 266680, 357080, 526693, 1053386, 2106772, 2633465, 4213544, 5266930, 10533860, 21067720]

約数ペア:

[(1, 21067720), (2, 10533860), (4, 5266930), (5, 4213544), (8, 2633465), (10, 2106772), (20, 1053386), (40, 526693), (59, 357080), (79, 266680), (113, 186440), (118, 178540), (158, 133340), (226, 93220), (236, 89270), (295, 71416), (316, 66670), (395, 53336), (452, 46610), (472, 44635), (565, 37288), (590, 35708), (632, 33335), (790, 26668), (904, 23305), (1130, 18644), (1180, 17854), (1580, 13334), (2260, 9322), (2360, 8927), (3160, 6667), (4520, 4661)]