1800000080

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{241}}^1\times {\mathrm{1049}}^1$

素因数の和:1392

約数の個数: 80

約数和(自身を含む): 4253634000

約数和(自身を除く): 2453633920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 241, 356, 445, 482, 712, 890, 964, 1049, 1205, 1424, 1780, 1928, 2098, 2410, 3560, 3856, 4196, 4820, 5245, 7120, 8392, 9640, 10490, 16784, 19280, 20980, 21449, 41960, 42898, 83920, 85796, 93361, 107245, 171592, 186722, 214490, 252809, 343184, 373444, 428980, 466805, 505618, 746888, 857960, 933610, 1011236, 1264045, 1493776, 1715920, 1867220, 2022472, 2528090, 3734440, 4044944, 5056180, 7468880, 10112360, 20224720, 22500001, 45000002, 90000004, 112500005, 180000008, 225000010, 360000016, 450000020, 900000040, 1800000080]

約数ペア:

[(1, 1800000080), (2, 900000040), (4, 450000020), (5, 360000016), (8, 225000010), (10, 180000008), (16, 112500005), (20, 90000004), (40, 45000002), (80, 22500001), (89, 20224720), (178, 10112360), (241, 7468880), (356, 5056180), (445, 4044944), (482, 3734440), (712, 2528090), (890, 2022472), (964, 1867220), (1049, 1715920), (1205, 1493776), (1424, 1264045), (1780, 1011236), (1928, 933610), (2098, 857960), (2410, 746888), (3560, 505618), (3856, 466805), (4196, 428980), (4820, 373444), (5245, 343184), (7120, 252809), (8392, 214490), (9640, 186722), (10490, 171592), (16784, 107245), (19280, 93361), (20980, 85796), (21449, 83920), (41960, 42898)]