21539816

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{251}}^1\times {\mathrm{631}}^1$

素因数の和:905

約数の個数: 32

約数和(自身を含む): 43001280

約数和(自身を除く): 21461464

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 251, 502, 631, 1004, 1262, 2008, 2524, 4267, 5048, 8534, 10727, 17068, 21454, 34136, 42908, 85816, 158381, 316762, 633524, 1267048, 2692477, 5384954, 10769908, 21539816]

約数ペア:

[(1, 21539816), (2, 10769908), (4, 5384954), (8, 2692477), (17, 1267048), (34, 633524), (68, 316762), (136, 158381), (251, 85816), (502, 42908), (631, 34136), (1004, 21454), (1262, 17068), (2008, 10727), (2524, 8534), (4267, 5048)]