21128640

素因数分解:

$2^6\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1693}}^1$

素因数の和:1726

約数の個数: 112

約数和(自身を含む): 72286368

約数和(自身を除く): 51157728

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 32, 39, 40, 48, 52, 60, 64, 65, 78, 80, 96, 104, 120, 130, 156, 160, 192, 195, 208, 240, 260, 312, 320, 390, 416, 480, 520, 624, 780, 832, 960, 1040, 1248, 1560, 1693, 2080, 2496, 3120, 3386, 4160, 5079, 6240, 6772, 8465, 10158, 12480, 13544, 16930, 20316, 22009, 25395, 27088, 33860, 40632, 44018, 50790, 54176, 66027, 67720, 81264, 88036, 101580, 108352, 110045, 132054, 135440, 162528, 176072, 203160, 220090, 264108, 270880, 325056, 330135, 352144, 406320, 440180, 528216, 541760, 660270, 704288, 812640, 880360, 1056432, 1320540, 1408576, 1625280, 1760720, 2112864, 2641080, 3521440, 4225728, 5282160, 7042880, 10564320, 21128640]

約数ペア:

[(1, 21128640), (2, 10564320), (3, 7042880), (4, 5282160), (5, 4225728), (6, 3521440), (8, 2641080), (10, 2112864), (12, 1760720), (13, 1625280), (15, 1408576), (16, 1320540), (20, 1056432), (24, 880360), (26, 812640), (30, 704288), (32, 660270), (39, 541760), (40, 528216), (48, 440180), (52, 406320), (60, 352144), (64, 330135), (65, 325056), (78, 270880), (80, 264108), (96, 220090), (104, 203160), (120, 176072), (130, 162528), (156, 135440), (160, 132054), (192, 110045), (195, 108352), (208, 101580), (240, 88036), (260, 81264), (312, 67720), (320, 66027), (390, 54176), (416, 50790), (480, 44018), (520, 40632), (624, 33860), (780, 27088), (832, 25395), (960, 22009), (1040, 20316), (1248, 16930), (1560, 13544), (1693, 12480), (2080, 10158), (2496, 8465), (3120, 6772), (3386, 6240), (4160, 5079)]