1288820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{4957}}^1$

素因数の和:4979

約数の個数: 24

約数和(自身を含む): 2915304

約数和(自身を除く): 1626484

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 4957, 9914, 19828, 24785, 49570, 64441, 99140, 128882, 257764, 322205, 644410, 1288820]

約数ペア:

[(1, 1288820), (2, 644410), (4, 322205), (5, 257764), (10, 128882), (13, 99140), (20, 64441), (26, 49570), (52, 24785), (65, 19828), (130, 9914), (260, 4957)]