87439340

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1\times {\mathrm{443}}^1$

素因数の和:662

約数の個数: 48

約数和(自身を含む): 187971840

約数和(自身を除く): 100532500

約数列:

[1, 2, 4, 5, 10, 20, 71, 139, 142, 278, 284, 355, 443, 556, 695, 710, 886, 1390, 1420, 1772, 2215, 2780, 4430, 8860, 9869, 19738, 31453, 39476, 49345, 61577, 62906, 98690, 123154, 125812, 157265, 197380, 246308, 307885, 314530, 615770, 629060, 1231540, 4371967, 8743934, 17487868, 21859835, 43719670, 87439340]

約数ペア:

[(1, 87439340), (2, 43719670), (4, 21859835), (5, 17487868), (10, 8743934), (20, 4371967), (71, 1231540), (139, 629060), (142, 615770), (278, 314530), (284, 307885), (355, 246308), (443, 197380), (556, 157265), (695, 125812), (710, 123154), (886, 98690), (1390, 62906), (1420, 61577), (1772, 49345), (2215, 39476), (2780, 31453), (4430, 19738), (8860, 9869)]