21257072

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{2521}}^1$

素因数の和:2577

約数の個数: 40

約数和(自身を含む): 45032832

約数和(自身を除く): 23775760

約数列:

[1, 2, 4, 8, 16, 17, 31, 34, 62, 68, 124, 136, 248, 272, 496, 527, 1054, 2108, 2521, 4216, 5042, 8432, 10084, 20168, 40336, 42857, 78151, 85714, 156302, 171428, 312604, 342856, 625208, 685712, 1250416, 1328567, 2657134, 5314268, 10628536, 21257072]

約数ペア:

[(1, 21257072), (2, 10628536), (4, 5314268), (8, 2657134), (16, 1328567), (17, 1250416), (31, 685712), (34, 625208), (62, 342856), (68, 312604), (124, 171428), (136, 156302), (248, 85714), (272, 78151), (496, 42857), (527, 40336), (1054, 20168), (2108, 10084), (2521, 8432), (4216, 5042)]