256320120

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{305143}}^1$

素因数の和:305164

約数の個数: 64

約数和(自身を含む): 878814720

約数和(自身を除く): 622494600

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 305143, 610286, 915429, 1220572, 1525715, 1830858, 2136001, 2441144, 3051430, 3661716, 4272002, 4577145, 6102860, 6408003, 7323432, 8544004, 9154290, 10680005, 12205720, 12816006, 17088008, 18308580, 21360010, 25632012, 32040015, 36617160, 42720020, 51264024, 64080030, 85440040, 128160060, 256320120]

約数ペア:

[(1, 256320120), (2, 128160060), (3, 85440040), (4, 64080030), (5, 51264024), (6, 42720020), (7, 36617160), (8, 32040015), (10, 25632012), (12, 21360010), (14, 18308580), (15, 17088008), (20, 12816006), (21, 12205720), (24, 10680005), (28, 9154290), (30, 8544004), (35, 7323432), (40, 6408003), (42, 6102860), (56, 4577145), (60, 4272002), (70, 3661716), (84, 3051430), (105, 2441144), (120, 2136001), (140, 1830858), (168, 1525715), (210, 1220572), (280, 915429), (420, 610286), (840, 305143)]