20502580

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{20921}}^1$

素因数の和:20944

約数の個数: 36

約数和(自身を含む): 50087268

約数和(自身を除く): 29584688

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 20921, 41842, 83684, 104605, 146447, 209210, 292894, 418420, 585788, 732235, 1025129, 1464470, 2050258, 2928940, 4100516, 5125645, 10251290, 20502580]

約数ペア:

[(1, 20502580), (2, 10251290), (4, 5125645), (5, 4100516), (7, 2928940), (10, 2050258), (14, 1464470), (20, 1025129), (28, 732235), (35, 585788), (49, 418420), (70, 292894), (98, 209210), (140, 146447), (196, 104605), (245, 83684), (490, 41842), (980, 20921)]