21235928

素因数分解:

$2^3\times 7^1\times {\mathrm{37}}^2\times {\mathrm{277}}^1$

素因数の和:364

約数の個数: 48

約数和(自身を含む): 46937520

約数和(自身を除く): 25701592

約数列:

[1, 2, 4, 7, 8, 14, 28, 37, 56, 74, 148, 259, 277, 296, 518, 554, 1036, 1108, 1369, 1939, 2072, 2216, 2738, 3878, 5476, 7756, 9583, 10249, 10952, 15512, 19166, 20498, 38332, 40996, 71743, 76664, 81992, 143486, 286972, 379213, 573944, 758426, 1516852, 2654491, 3033704, 5308982, 10617964, 21235928]

約数ペア:

[(1, 21235928), (2, 10617964), (4, 5308982), (7, 3033704), (8, 2654491), (14, 1516852), (28, 758426), (37, 573944), (56, 379213), (74, 286972), (148, 143486), (259, 81992), (277, 76664), (296, 71743), (518, 40996), (554, 38332), (1036, 20498), (1108, 19166), (1369, 15512), (1939, 10952), (2072, 10249), (2216, 9583), (2738, 7756), (3878, 5476)]