19489240

素因数分解:

$2^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{5023}}^1$

素因数の和:5131

約数の個数: 32

約数和(自身を含む): 44311680

約数和(自身を除く): 24822440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 97, 194, 388, 485, 776, 970, 1940, 3880, 5023, 10046, 20092, 25115, 40184, 50230, 100460, 200920, 487231, 974462, 1948924, 2436155, 3897848, 4872310, 9744620, 19489240]

約数ペア:

[(1, 19489240), (2, 9744620), (4, 4872310), (5, 3897848), (8, 2436155), (10, 1948924), (20, 974462), (40, 487231), (97, 200920), (194, 100460), (388, 50230), (485, 40184), (776, 25115), (970, 20092), (1940, 10046), (3880, 5023)]