19780600

素因数分解:

$2^3\times 5^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{199}}^1$

素因数の和:293

約数の個数: 96

約数和(自身を含む): 53568000

約数和(自身を除く): 33787400

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 35, 40, 50, 56, 70, 71, 100, 140, 142, 175, 199, 200, 280, 284, 350, 355, 398, 497, 568, 700, 710, 796, 994, 995, 1393, 1400, 1420, 1592, 1775, 1988, 1990, 2485, 2786, 2840, 3550, 3976, 3980, 4970, 4975, 5572, 6965, 7100, 7960, 9940, 9950, 11144, 12425, 13930, 14129, 14200, 19880, 19900, 24850, 27860, 28258, 34825, 39800, 49700, 55720, 56516, 69650, 70645, 98903, 99400, 113032, 139300, 141290, 197806, 278600, 282580, 353225, 395612, 494515, 565160, 706450, 791224, 989030, 1412900, 1978060, 2472575, 2825800, 3956120, 4945150, 9890300, 19780600]

約数ペア:

[(1, 19780600), (2, 9890300), (4, 4945150), (5, 3956120), (7, 2825800), (8, 2472575), (10, 1978060), (14, 1412900), (20, 989030), (25, 791224), (28, 706450), (35, 565160), (40, 494515), (50, 395612), (56, 353225), (70, 282580), (71, 278600), (100, 197806), (140, 141290), (142, 139300), (175, 113032), (199, 99400), (200, 98903), (280, 70645), (284, 69650), (350, 56516), (355, 55720), (398, 49700), (497, 39800), (568, 34825), (700, 28258), (710, 27860), (796, 24850), (994, 19900), (995, 19880), (1393, 14200), (1400, 14129), (1420, 13930), (1592, 12425), (1775, 11144), (1988, 9950), (1990, 9940), (2485, 7960), (2786, 7100), (2840, 6965), (3550, 5572), (3976, 4975), (3980, 4970)]