1978060

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{199}}^1$

素因数の和:286

約数の個数: 48

約数和(自身を含む): 4838400

約数和(自身を除く): 2860340

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 71, 140, 142, 199, 284, 355, 398, 497, 710, 796, 994, 995, 1393, 1420, 1988, 1990, 2485, 2786, 3980, 4970, 5572, 6965, 9940, 13930, 14129, 27860, 28258, 56516, 70645, 98903, 141290, 197806, 282580, 395612, 494515, 989030, 1978060]

約数ペア:

[(1, 1978060), (2, 989030), (4, 494515), (5, 395612), (7, 282580), (10, 197806), (14, 141290), (20, 98903), (28, 70645), (35, 56516), (70, 28258), (71, 27860), (140, 14129), (142, 13930), (199, 9940), (284, 6965), (355, 5572), (398, 4970), (497, 3980), (710, 2786), (796, 2485), (994, 1990), (995, 1988), (1393, 1420)]