20395040

素因数分解:

$2^5\times 5^1\times {\mathrm{41}}^1\times {\mathrm{3109}}^1$

素因数の和:3165

約数の個数: 48

約数和(自身を含む): 49374360

約数和(自身を除く): 28979320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 80, 82, 160, 164, 205, 328, 410, 656, 820, 1312, 1640, 3109, 3280, 6218, 6560, 12436, 15545, 24872, 31090, 49744, 62180, 99488, 124360, 127469, 248720, 254938, 497440, 509876, 637345, 1019752, 1274690, 2039504, 2549380, 4079008, 5098760, 10197520, 20395040]

約数ペア:

[(1, 20395040), (2, 10197520), (4, 5098760), (5, 4079008), (8, 2549380), (10, 2039504), (16, 1274690), (20, 1019752), (32, 637345), (40, 509876), (41, 497440), (80, 254938), (82, 248720), (160, 127469), (164, 124360), (205, 99488), (328, 62180), (410, 49744), (656, 31090), (820, 24872), (1312, 15545), (1640, 12436), (3109, 6560), (3280, 6218)]