20561600

素因数分解:

$2^6\times 5^2\times {\mathrm{71}}^1\times {\mathrm{181}}^1$

素因数の和:274

約数の個数: 84

約数和(自身を含む): 51590448

約数和(自身を除く): 31028848

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 71, 80, 100, 142, 160, 181, 200, 284, 320, 355, 362, 400, 568, 710, 724, 800, 905, 1136, 1420, 1448, 1600, 1775, 1810, 2272, 2840, 2896, 3550, 3620, 4525, 4544, 5680, 5792, 7100, 7240, 9050, 11360, 11584, 12851, 14200, 14480, 18100, 22720, 25702, 28400, 28960, 36200, 51404, 56800, 57920, 64255, 72400, 102808, 113600, 128510, 144800, 205616, 257020, 289600, 321275, 411232, 514040, 642550, 822464, 1028080, 1285100, 2056160, 2570200, 4112320, 5140400, 10280800, 20561600]

約数ペア:

[(1, 20561600), (2, 10280800), (4, 5140400), (5, 4112320), (8, 2570200), (10, 2056160), (16, 1285100), (20, 1028080), (25, 822464), (32, 642550), (40, 514040), (50, 411232), (64, 321275), (71, 289600), (80, 257020), (100, 205616), (142, 144800), (160, 128510), (181, 113600), (200, 102808), (284, 72400), (320, 64255), (355, 57920), (362, 56800), (400, 51404), (568, 36200), (710, 28960), (724, 28400), (800, 25702), (905, 22720), (1136, 18100), (1420, 14480), (1448, 14200), (1600, 12851), (1775, 11584), (1810, 11360), (2272, 9050), (2840, 7240), (2896, 7100), (3550, 5792), (3620, 5680), (4525, 4544)]