21688744

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{257}}^1$

素因数の和:418

約数の個数: 64

約数和(自身を含む): 51269760

約数和(自身を除く): 29581016

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 44, 56, 77, 88, 137, 154, 257, 274, 308, 514, 548, 616, 959, 1028, 1096, 1507, 1799, 1918, 2056, 2827, 3014, 3598, 3836, 5654, 6028, 7196, 7672, 10549, 11308, 12056, 14392, 19789, 21098, 22616, 35209, 39578, 42196, 70418, 79156, 84392, 140836, 158312, 246463, 281672, 387299, 492926, 774598, 985852, 1549196, 1971704, 2711093, 3098392, 5422186, 10844372, 21688744]

約数ペア:

[(1, 21688744), (2, 10844372), (4, 5422186), (7, 3098392), (8, 2711093), (11, 1971704), (14, 1549196), (22, 985852), (28, 774598), (44, 492926), (56, 387299), (77, 281672), (88, 246463), (137, 158312), (154, 140836), (257, 84392), (274, 79156), (308, 70418), (514, 42196), (548, 39578), (616, 35209), (959, 22616), (1028, 21098), (1096, 19789), (1507, 14392), (1799, 12056), (1918, 11308), (2056, 10549), (2827, 7672), (3014, 7196), (3598, 6028), (3836, 5654)]