21687848

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^3$

素因数の和:119

約数の個数: 64

約数和(自身を含む): 51717120

約数和(自身を除く): 30029272

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 31, 52, 56, 62, 91, 104, 124, 182, 217, 248, 364, 403, 434, 728, 806, 868, 961, 1612, 1736, 1922, 2821, 3224, 3844, 5642, 6727, 7688, 11284, 12493, 13454, 22568, 24986, 26908, 29791, 49972, 53816, 59582, 87451, 99944, 119164, 174902, 208537, 238328, 349804, 387283, 417074, 699608, 774566, 834148, 1549132, 1668296, 2710981, 3098264, 5421962, 10843924, 21687848]

約数ペア:

[(1, 21687848), (2, 10843924), (4, 5421962), (7, 3098264), (8, 2710981), (13, 1668296), (14, 1549132), (26, 834148), (28, 774566), (31, 699608), (52, 417074), (56, 387283), (62, 349804), (91, 238328), (104, 208537), (124, 174902), (182, 119164), (217, 99944), (248, 87451), (364, 59582), (403, 53816), (434, 49972), (728, 29791), (806, 26908), (868, 24986), (961, 22568), (1612, 13454), (1736, 12493), (1922, 11284), (2821, 7688), (3224, 6727), (3844, 5642)]