28171520

素因数分解:

$2^8\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1693}}^1$

素因数の和:1727

約数の個数: 72

約数和(自身を含む): 72713256

約数和(自身を除く): 44541736

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 256, 260, 320, 416, 520, 640, 832, 1040, 1280, 1664, 1693, 2080, 3328, 3386, 4160, 6772, 8320, 8465, 13544, 16640, 16930, 22009, 27088, 33860, 44018, 54176, 67720, 88036, 108352, 110045, 135440, 176072, 216704, 220090, 270880, 352144, 433408, 440180, 541760, 704288, 880360, 1083520, 1408576, 1760720, 2167040, 2817152, 3521440, 5634304, 7042880, 14085760, 28171520]

約数ペア:

[(1, 28171520), (2, 14085760), (4, 7042880), (5, 5634304), (8, 3521440), (10, 2817152), (13, 2167040), (16, 1760720), (20, 1408576), (26, 1083520), (32, 880360), (40, 704288), (52, 541760), (64, 440180), (65, 433408), (80, 352144), (104, 270880), (128, 220090), (130, 216704), (160, 176072), (208, 135440), (256, 110045), (260, 108352), (320, 88036), (416, 67720), (520, 54176), (640, 44018), (832, 33860), (1040, 27088), (1280, 22009), (1664, 16930), (1693, 16640), (2080, 13544), (3328, 8465), (3386, 8320), (4160, 6772)]