8620780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{443}}^1$

素因数の和:598

約数の個数: 48

約数和(自身を含む): 20885760

約数和(自身を除く): 12264980

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 139, 140, 278, 443, 556, 695, 886, 973, 1390, 1772, 1946, 2215, 2780, 3101, 3892, 4430, 4865, 6202, 8860, 9730, 12404, 15505, 19460, 31010, 61577, 62020, 123154, 246308, 307885, 431039, 615770, 862078, 1231540, 1724156, 2155195, 4310390, 8620780]

約数ペア:

[(1, 8620780), (2, 4310390), (4, 2155195), (5, 1724156), (7, 1231540), (10, 862078), (14, 615770), (20, 431039), (28, 307885), (35, 246308), (70, 123154), (139, 62020), (140, 61577), (278, 31010), (443, 19460), (556, 15505), (695, 12404), (886, 9730), (973, 8860), (1390, 6202), (1772, 4865), (1946, 4430), (2215, 3892), (2780, 3101)]