78640400

素因数分解:

$2^4\times 5^2\times {\mathrm{47}}^2\times {\mathrm{89}}^1$

素因数の和:201

約数の個数: 90

約数和(自身を含む): 195207930

約数和(自身を除く): 116567530

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 47, 50, 80, 89, 94, 100, 178, 188, 200, 235, 356, 376, 400, 445, 470, 712, 752, 890, 940, 1175, 1424, 1780, 1880, 2209, 2225, 2350, 3560, 3760, 4183, 4418, 4450, 4700, 7120, 8366, 8836, 8900, 9400, 11045, 16732, 17672, 17800, 18800, 20915, 22090, 33464, 35344, 35600, 41830, 44180, 55225, 66928, 83660, 88360, 104575, 110450, 167320, 176720, 196601, 209150, 220900, 334640, 393202, 418300, 441800, 786404, 836600, 883600, 983005, 1572808, 1673200, 1966010, 3145616, 3932020, 4915025, 7864040, 9830050, 15728080, 19660100, 39320200, 78640400]

約数ペア:

[(1, 78640400), (2, 39320200), (4, 19660100), (5, 15728080), (8, 9830050), (10, 7864040), (16, 4915025), (20, 3932020), (25, 3145616), (40, 1966010), (47, 1673200), (50, 1572808), (80, 983005), (89, 883600), (94, 836600), (100, 786404), (178, 441800), (188, 418300), (200, 393202), (235, 334640), (356, 220900), (376, 209150), (400, 196601), (445, 176720), (470, 167320), (712, 110450), (752, 104575), (890, 88360), (940, 83660), (1175, 66928), (1424, 55225), (1780, 44180), (1880, 41830), (2209, 35600), (2225, 35344), (2350, 33464), (3560, 22090), (3760, 20915), (4183, 18800), (4418, 17800), (4450, 17672), (4700, 16732), (7120, 11045), (8366, 9400), (8836, 8900)]