20161720

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{8263}}^1$

素因数の和:8335

約数の個数: 32

約数和(自身を含む): 46113120

約数和(自身を除く): 25951400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 8263, 16526, 33052, 41315, 66104, 82630, 165260, 330520, 504043, 1008086, 2016172, 2520215, 4032344, 5040430, 10080860, 20161720]

約数ペア:

[(1, 20161720), (2, 10080860), (4, 5040430), (5, 4032344), (8, 2520215), (10, 2016172), (20, 1008086), (40, 504043), (61, 330520), (122, 165260), (244, 82630), (305, 66104), (488, 41315), (610, 33052), (1220, 16526), (2440, 8263)]