21259420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{11681}}^1$

素因数の和:11710

約数の個数: 48

約数和(自身を含む): 54952128

約数和(自身を除く): 33692708

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 11681, 23362, 46724, 58405, 81767, 116810, 151853, 163534, 233620, 303706, 327068, 408835, 607412, 759265, 817670, 1062971, 1518530, 1635340, 2125942, 3037060, 4251884, 5314855, 10629710, 21259420]

約数ペア:

[(1, 21259420), (2, 10629710), (4, 5314855), (5, 4251884), (7, 3037060), (10, 2125942), (13, 1635340), (14, 1518530), (20, 1062971), (26, 817670), (28, 759265), (35, 607412), (52, 408835), (65, 327068), (70, 303706), (91, 233620), (130, 163534), (140, 151853), (182, 116810), (260, 81767), (364, 58405), (455, 46724), (910, 23362), (1820, 11681)]