21619780

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{1697}}^1$

素因数の和:1733

約数の個数: 72

約数和(自身を含む): 56910168

約数和(自身を除く): 35290388

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 49, 52, 65, 70, 91, 98, 130, 140, 182, 196, 245, 260, 364, 455, 490, 637, 910, 980, 1274, 1697, 1820, 2548, 3185, 3394, 6370, 6788, 8485, 11879, 12740, 16970, 22061, 23758, 33940, 44122, 47516, 59395, 83153, 88244, 110305, 118790, 154427, 166306, 220610, 237580, 308854, 332612, 415765, 441220, 617708, 772135, 831530, 1080989, 1544270, 1663060, 2161978, 3088540, 4323956, 5404945, 10809890, 21619780]

約数ペア:

[(1, 21619780), (2, 10809890), (4, 5404945), (5, 4323956), (7, 3088540), (10, 2161978), (13, 1663060), (14, 1544270), (20, 1080989), (26, 831530), (28, 772135), (35, 617708), (49, 441220), (52, 415765), (65, 332612), (70, 308854), (91, 237580), (98, 220610), (130, 166306), (140, 154427), (182, 118790), (196, 110305), (245, 88244), (260, 83153), (364, 59395), (455, 47516), (490, 44122), (637, 33940), (910, 23758), (980, 22061), (1274, 16970), (1697, 12740), (1820, 11879), (2548, 8485), (3185, 6788), (3394, 6370)]