21076588

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{409}}^1\times {\mathrm{991}}^1$

素因数の和:1417

約数の個数: 24

約数和(自身を含む): 39858560

約数和(自身を除く): 18781972

約数列:

[1, 2, 4, 13, 26, 52, 409, 818, 991, 1636, 1982, 3964, 5317, 10634, 12883, 21268, 25766, 51532, 405319, 810638, 1621276, 5269147, 10538294, 21076588]

約数ペア:

[(1, 21076588), (2, 10538294), (4, 5269147), (13, 1621276), (26, 810638), (52, 405319), (409, 51532), (818, 25766), (991, 21268), (1636, 12883), (1982, 10634), (3964, 5317)]