42840520

素因数分解:

$2^3\times 5^1\times {\mathrm{971}}^1\times {\mathrm{1103}}^1$

素因数の和:2085

約数の個数: 32

約数和(自身を含む): 96577920

約数和(自身を除く): 53737400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 971, 1103, 1942, 2206, 3884, 4412, 4855, 5515, 7768, 8824, 9710, 11030, 19420, 22060, 38840, 44120, 1071013, 2142026, 4284052, 5355065, 8568104, 10710130, 21420260, 42840520]

約数ペア:

[(1, 42840520), (2, 21420260), (4, 10710130), (5, 8568104), (8, 5355065), (10, 4284052), (20, 2142026), (40, 1071013), (971, 44120), (1103, 38840), (1942, 22060), (2206, 19420), (3884, 11030), (4412, 9710), (4855, 8824), (5515, 7768)]