21604240

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{173}}^1\times {\mathrm{223}}^1$

素因数の和:416

約数の個数: 80

約数和(自身を含む): 57996288

約数和(自身を除く): 36392048

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 173, 223, 280, 346, 446, 560, 692, 865, 892, 1115, 1211, 1384, 1561, 1730, 1784, 2230, 2422, 2768, 3122, 3460, 3568, 4460, 4844, 6055, 6244, 6920, 7805, 8920, 9688, 12110, 12488, 13840, 15610, 17840, 19376, 24220, 24976, 31220, 38579, 48440, 62440, 77158, 96880, 124880, 154316, 192895, 270053, 308632, 385790, 540106, 617264, 771580, 1080212, 1350265, 1543160, 2160424, 2700530, 3086320, 4320848, 5401060, 10802120, 21604240]

約数ペア:

[(1, 21604240), (2, 10802120), (4, 5401060), (5, 4320848), (7, 3086320), (8, 2700530), (10, 2160424), (14, 1543160), (16, 1350265), (20, 1080212), (28, 771580), (35, 617264), (40, 540106), (56, 385790), (70, 308632), (80, 270053), (112, 192895), (140, 154316), (173, 124880), (223, 96880), (280, 77158), (346, 62440), (446, 48440), (560, 38579), (692, 31220), (865, 24976), (892, 24220), (1115, 19376), (1211, 17840), (1384, 15610), (1561, 13840), (1730, 12488), (1784, 12110), (2230, 9688), (2422, 8920), (2768, 7805), (3122, 6920), (3460, 6244), (3568, 6055), (4460, 4844)]