21120320

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{5077}}^1$

素因数の和:5107

約数の個数: 56

約数和(自身を含む): 54172104

約数和(自身を除く): 33051784

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 130, 160, 208, 260, 320, 416, 520, 832, 1040, 2080, 4160, 5077, 10154, 20308, 25385, 40616, 50770, 66001, 81232, 101540, 132002, 162464, 203080, 264004, 324928, 330005, 406160, 528008, 660010, 812320, 1056016, 1320020, 1624640, 2112032, 2640040, 4224064, 5280080, 10560160, 21120320]

約数ペア:

[(1, 21120320), (2, 10560160), (4, 5280080), (5, 4224064), (8, 2640040), (10, 2112032), (13, 1624640), (16, 1320020), (20, 1056016), (26, 812320), (32, 660010), (40, 528008), (52, 406160), (64, 330005), (65, 324928), (80, 264004), (104, 203080), (130, 162464), (160, 132002), (208, 101540), (260, 81232), (320, 66001), (416, 50770), (520, 40616), (832, 25385), (1040, 20308), (2080, 10154), (4160, 5077)]