20647956

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{409}}^1\times {\mathrm{601}}^1$

素因数の和:1024

約数の個数: 48

約数和(自身を含む): 55287680

約数和(自身を除く): 34639724

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84, 409, 601, 818, 1202, 1227, 1636, 1803, 2404, 2454, 2863, 3606, 4207, 4908, 5726, 7212, 8414, 8589, 11452, 12621, 16828, 17178, 25242, 34356, 50484, 245809, 491618, 737427, 983236, 1474854, 1720663, 2949708, 3441326, 5161989, 6882652, 10323978, 20647956]

約数ペア:

[(1, 20647956), (2, 10323978), (3, 6882652), (4, 5161989), (6, 3441326), (7, 2949708), (12, 1720663), (14, 1474854), (21, 983236), (28, 737427), (42, 491618), (84, 245809), (409, 50484), (601, 34356), (818, 25242), (1202, 17178), (1227, 16828), (1636, 12621), (1803, 11452), (2404, 8589), (2454, 8414), (2863, 7212), (3606, 5726), (4207, 4908)]