20808536

素因数分解:

$2^3\times 7^2\times {\mathrm{109}}^1\times {\mathrm{487}}^1$

素因数の和:616

約数の個数: 48

約数和(自身を含む): 45896400

約数和(自身を除く): 25087864

約数列:

[1, 2, 4, 7, 8, 14, 28, 49, 56, 98, 109, 196, 218, 392, 436, 487, 763, 872, 974, 1526, 1948, 3052, 3409, 3896, 5341, 6104, 6818, 10682, 13636, 21364, 23863, 27272, 42728, 47726, 53083, 95452, 106166, 190904, 212332, 371581, 424664, 743162, 1486324, 2601067, 2972648, 5202134, 10404268, 20808536]

約数ペア:

[(1, 20808536), (2, 10404268), (4, 5202134), (7, 2972648), (8, 2601067), (14, 1486324), (28, 743162), (49, 424664), (56, 371581), (98, 212332), (109, 190904), (196, 106166), (218, 95452), (392, 53083), (436, 47726), (487, 42728), (763, 27272), (872, 23863), (974, 21364), (1526, 13636), (1948, 10682), (3052, 6818), (3409, 6104), (3896, 5341)]