8638820

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{73}}^1\times {\mathrm{97}}^1$

素因数の和:240

約数の個数: 48

約数和(自身を含む): 18884208

約数和(自身を除く): 10245388

約数列:

[1, 2, 4, 5, 10, 20, 61, 73, 97, 122, 146, 194, 244, 292, 305, 365, 388, 485, 610, 730, 970, 1220, 1460, 1940, 4453, 5917, 7081, 8906, 11834, 14162, 17812, 22265, 23668, 28324, 29585, 35405, 44530, 59170, 70810, 89060, 118340, 141620, 431941, 863882, 1727764, 2159705, 4319410, 8638820]

約数ペア:

[(1, 8638820), (2, 4319410), (4, 2159705), (5, 1727764), (10, 863882), (20, 431941), (61, 141620), (73, 118340), (97, 89060), (122, 70810), (146, 59170), (194, 44530), (244, 35405), (292, 29585), (305, 28324), (365, 23668), (388, 22265), (485, 17812), (610, 14162), (730, 11834), (970, 8906), (1220, 7081), (1460, 5917), (1940, 4453)]