21250004

素因数分解:

$2^2\times {\mathrm{31}}^1\times {\mathrm{409}}^1\times {\mathrm{419}}^1$

素因数の和:863

約数の個数: 24

約数和(自身を含む): 38572800

約数和(自身を除く): 17322796

約数列:

[1, 2, 4, 31, 62, 124, 409, 419, 818, 838, 1636, 1676, 12679, 12989, 25358, 25978, 50716, 51956, 171371, 342742, 685484, 5312501, 10625002, 21250004]

約数ペア:

[(1, 21250004), (2, 10625002), (4, 5312501), (31, 685484), (62, 342742), (124, 171371), (409, 51956), (419, 50716), (818, 25978), (838, 25358), (1636, 12989), (1676, 12679)]