21000939948

素因数分解:

$2^2\times 3^2\times {\mathrm{439}}^1\times {\mathrm{499}}^1\times {\mathrm{2663}}^1$

素因数の和:3611

約数の個数: 72

約数和(自身を含む): 53333280000

約数和(自身を除く): 32332340052

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 439, 499, 878, 998, 1317, 1497, 1756, 1996, 2634, 2663, 2994, 3951, 4491, 5268, 5326, 5988, 7902, 7989, 8982, 10652, 15804, 15978, 17964, 23967, 31956, 47934, 95868, 219061, 438122, 657183, 876244, 1169057, 1314366, 1328837, 1971549, 2338114, 2628732, 2657674, 3507171, 3943098, 3986511, 4676228, 5315348, 7014342, 7886196, 7973022, 10521513, 11959533, 14028684, 15946044, 21043026, 23919066, 42086052, 47838132, 583359443, 1166718886, 1750078329, 2333437772, 3500156658, 5250234987, 7000313316, 10500469974, 21000939948]

約数ペア:

[(1, 21000939948), (2, 10500469974), (3, 7000313316), (4, 5250234987), (6, 3500156658), (9, 2333437772), (12, 1750078329), (18, 1166718886), (36, 583359443), (439, 47838132), (499, 42086052), (878, 23919066), (998, 21043026), (1317, 15946044), (1497, 14028684), (1756, 11959533), (1996, 10521513), (2634, 7973022), (2663, 7886196), (2994, 7014342), (3951, 5315348), (4491, 4676228), (5268, 3986511), (5326, 3943098), (5988, 3507171), (7902, 2657674), (7989, 2628732), (8982, 2338114), (10652, 1971549), (15804, 1328837), (15978, 1314366), (17964, 1169057), (23967, 876244), (31956, 657183), (47934, 438122), (95868, 219061)]