21000604400

素因数分解:

$2^4\times 5^2\times {\mathrm{5209}}^1\times {\mathrm{10079}}^1$

素因数の和:15306

約数の個数: 60

約数和(自身を含む): 50468644800

約数和(自身を除く): 29468040400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 5209, 10079, 10418, 20158, 20836, 26045, 40316, 41672, 50395, 52090, 80632, 83344, 100790, 104180, 130225, 161264, 201580, 208360, 251975, 260450, 403160, 416720, 503950, 520900, 806320, 1007900, 1041800, 2015800, 2083600, 4031600, 52501511, 105003022, 210006044, 262507555, 420012088, 525015110, 840024176, 1050030220, 1312537775, 2100060440, 2625075550, 4200120880, 5250151100, 10500302200, 21000604400]

約数ペア:

[(1, 21000604400), (2, 10500302200), (4, 5250151100), (5, 4200120880), (8, 2625075550), (10, 2100060440), (16, 1312537775), (20, 1050030220), (25, 840024176), (40, 525015110), (50, 420012088), (80, 262507555), (100, 210006044), (200, 105003022), (400, 52501511), (5209, 4031600), (10079, 2083600), (10418, 2015800), (20158, 1041800), (20836, 1007900), (26045, 806320), (40316, 520900), (41672, 503950), (50395, 416720), (52090, 403160), (80632, 260450), (83344, 251975), (100790, 208360), (104180, 201580), (130225, 161264)]