21981310

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{353}}^1\times {\mathrm{479}}^1$

素因数の和:852

約数の個数: 32

約数和(自身を含む): 42819840

約数和(自身を除く): 20838530

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 353, 479, 706, 958, 1765, 2395, 3530, 4589, 4790, 6227, 9178, 12454, 22945, 31135, 45890, 62270, 169087, 338174, 845435, 1690870, 2198131, 4396262, 10990655, 21981310]

約数ペア:

[(1, 21981310), (2, 10990655), (5, 4396262), (10, 2198131), (13, 1690870), (26, 845435), (65, 338174), (130, 169087), (353, 62270), (479, 45890), (706, 31135), (958, 22945), (1765, 12454), (2395, 9178), (3530, 6227), (4589, 4790)]