21394256

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{1409}}^1$

素因数の和:1503

約数の個数: 40

約数和(自身を含む): 45283560

約数和(自身を除く): 23889304

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 73, 104, 146, 208, 292, 584, 949, 1168, 1409, 1898, 2818, 3796, 5636, 7592, 11272, 15184, 18317, 22544, 36634, 73268, 102857, 146536, 205714, 293072, 411428, 822856, 1337141, 1645712, 2674282, 5348564, 10697128, 21394256]

約数ペア:

[(1, 21394256), (2, 10697128), (4, 5348564), (8, 2674282), (13, 1645712), (16, 1337141), (26, 822856), (52, 411428), (73, 293072), (104, 205714), (146, 146536), (208, 102857), (292, 73268), (584, 36634), (949, 22544), (1168, 18317), (1409, 15184), (1898, 11272), (2818, 7592), (3796, 5636)]