778120

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{397}}^1$

素因数の和:422

約数の個数: 48

約数和(自身を含む): 2041740

約数和(自身を除く): 1263620

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 397, 490, 794, 980, 1588, 1960, 1985, 2779, 3176, 3970, 5558, 7940, 11116, 13895, 15880, 19453, 22232, 27790, 38906, 55580, 77812, 97265, 111160, 155624, 194530, 389060, 778120]

約数ペア:

[(1, 778120), (2, 389060), (4, 194530), (5, 155624), (7, 111160), (8, 97265), (10, 77812), (14, 55580), (20, 38906), (28, 27790), (35, 22232), (40, 19453), (49, 15880), (56, 13895), (70, 11116), (98, 7940), (140, 5558), (196, 3970), (245, 3176), (280, 2779), (392, 1985), (397, 1960), (490, 1588), (794, 980)]