278313560

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{993977}}^1$

素因数の和:993995

約数の個数: 32

約数和(自身を含む): 715664160

約数和(自身を除く): 437350600

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 993977, 1987954, 3975908, 4969885, 6957839, 7951816, 9939770, 13915678, 19879540, 27831356, 34789195, 39759080, 55662712, 69578390, 139156780, 278313560]

約数ペア:

[(1, 278313560), (2, 139156780), (4, 69578390), (5, 55662712), (7, 39759080), (8, 34789195), (10, 27831356), (14, 19879540), (20, 13915678), (28, 9939770), (35, 7951816), (40, 6957839), (56, 4969885), (70, 3975908), (140, 1987954), (280, 993977)]