21655816

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{151}}^1\times {\mathrm{197}}^1$

素因数の和:374

約数の個数: 64

約数和(自身を含む): 50561280

約数和(自身を除く): 28905464

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 151, 182, 197, 302, 364, 394, 604, 728, 788, 1057, 1208, 1379, 1576, 1963, 2114, 2561, 2758, 3926, 4228, 5122, 5516, 7852, 8456, 10244, 11032, 13741, 15704, 17927, 20488, 27482, 29747, 35854, 54964, 59494, 71708, 109928, 118988, 143416, 208229, 237976, 386711, 416458, 773422, 832916, 1546844, 1665832, 2706977, 3093688, 5413954, 10827908, 21655816]

約数ペア:

[(1, 21655816), (2, 10827908), (4, 5413954), (7, 3093688), (8, 2706977), (13, 1665832), (14, 1546844), (26, 832916), (28, 773422), (52, 416458), (56, 386711), (91, 237976), (104, 208229), (151, 143416), (182, 118988), (197, 109928), (302, 71708), (364, 59494), (394, 54964), (604, 35854), (728, 29747), (788, 27482), (1057, 20488), (1208, 17927), (1379, 15704), (1576, 13741), (1963, 11032), (2114, 10244), (2561, 8456), (2758, 7852), (3926, 5516), (4228, 5122)]