21534440

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{263}}^1$

素因数の和:386

約数の個数: 64

約数和(自身を含む): 51321600

約数和(自身を除く): 29787160

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 89, 92, 115, 178, 184, 230, 263, 356, 445, 460, 526, 712, 890, 920, 1052, 1315, 1780, 2047, 2104, 2630, 3560, 4094, 5260, 6049, 8188, 10235, 10520, 12098, 16376, 20470, 23407, 24196, 30245, 40940, 46814, 48392, 60490, 81880, 93628, 117035, 120980, 187256, 234070, 241960, 468140, 538361, 936280, 1076722, 2153444, 2691805, 4306888, 5383610, 10767220, 21534440]

約数ペア:

[(1, 21534440), (2, 10767220), (4, 5383610), (5, 4306888), (8, 2691805), (10, 2153444), (20, 1076722), (23, 936280), (40, 538361), (46, 468140), (89, 241960), (92, 234070), (115, 187256), (178, 120980), (184, 117035), (230, 93628), (263, 81880), (356, 60490), (445, 48392), (460, 46814), (526, 40940), (712, 30245), (890, 24196), (920, 23407), (1052, 20470), (1315, 16376), (1780, 12098), (2047, 10520), (2104, 10235), (2630, 8188), (3560, 6049), (4094, 5260)]