204525020

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{208699}}^1$

素因数の和:208722

約数の個数: 36

約数和(自身を含む): 499627800

約数和(自身を除く): 295102780

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 208699, 417398, 834796, 1043495, 1460893, 2086990, 2921786, 4173980, 5843572, 7304465, 10226251, 14608930, 20452502, 29217860, 40905004, 51131255, 102262510, 204525020]

約数ペア:

[(1, 204525020), (2, 102262510), (4, 51131255), (5, 40905004), (7, 29217860), (10, 20452502), (14, 14608930), (20, 10226251), (28, 7304465), (35, 5843572), (49, 4173980), (70, 2921786), (98, 2086990), (140, 1460893), (196, 1043495), (245, 834796), (490, 417398), (980, 208699)]