19989550

素因数分解:

$2^1\times 5^2\times 7^2\times {\mathrm{41}}^1\times {\mathrm{199}}^1$

素因数の和:266

約数の個数: 72

約数和(自身を含む): 44528400

約数和(自身を除く): 24538850

約数列:

[1, 2, 5, 7, 10, 14, 25, 35, 41, 49, 50, 70, 82, 98, 175, 199, 205, 245, 287, 350, 398, 410, 490, 574, 995, 1025, 1225, 1393, 1435, 1990, 2009, 2050, 2450, 2786, 2870, 4018, 4975, 6965, 7175, 8159, 9751, 9950, 10045, 13930, 14350, 16318, 19502, 20090, 34825, 40795, 48755, 50225, 57113, 69650, 81590, 97510, 100450, 114226, 203975, 243775, 285565, 399791, 407950, 487550, 571130, 799582, 1427825, 1998955, 2855650, 3997910, 9994775, 19989550]

約数ペア:

[(1, 19989550), (2, 9994775), (5, 3997910), (7, 2855650), (10, 1998955), (14, 1427825), (25, 799582), (35, 571130), (41, 487550), (49, 407950), (50, 399791), (70, 285565), (82, 243775), (98, 203975), (175, 114226), (199, 100450), (205, 97510), (245, 81590), (287, 69650), (350, 57113), (398, 50225), (410, 48755), (490, 40795), (574, 34825), (995, 20090), (1025, 19502), (1225, 16318), (1393, 14350), (1435, 13930), (1990, 10045), (2009, 9950), (2050, 9751), (2450, 8159), (2786, 7175), (2870, 6965), (4018, 4975)]