21368984

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{197}}^1$

素因数の和:372

約数の個数: 64

約数和(自身を含む): 49896000

約数和(自身を除く): 28527016

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 149, 182, 197, 298, 364, 394, 596, 728, 788, 1043, 1192, 1379, 1576, 1937, 2086, 2561, 2758, 3874, 4172, 5122, 5516, 7748, 8344, 10244, 11032, 13559, 15496, 17927, 20488, 27118, 29353, 35854, 54236, 58706, 71708, 108472, 117412, 143416, 205471, 234824, 381589, 410942, 763178, 821884, 1526356, 1643768, 2671123, 3052712, 5342246, 10684492, 21368984]

約数ペア:

[(1, 21368984), (2, 10684492), (4, 5342246), (7, 3052712), (8, 2671123), (13, 1643768), (14, 1526356), (26, 821884), (28, 763178), (52, 410942), (56, 381589), (91, 234824), (104, 205471), (149, 143416), (182, 117412), (197, 108472), (298, 71708), (364, 58706), (394, 54236), (596, 35854), (728, 29353), (788, 27118), (1043, 20488), (1192, 17927), (1379, 15496), (1576, 13559), (1937, 11032), (2086, 10244), (2561, 8344), (2758, 7748), (3874, 5516), (4172, 5122)]