21489291280

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{1487}}^1\times {\mathrm{4201}}^1$

素因数の和:5744

約数の個数: 80

約数和(自身を含む): 51171081984

約数和(自身を除く): 29681790704

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1487, 1720, 2974, 3440, 4201, 5948, 7435, 8402, 11896, 14870, 16804, 21005, 23792, 29740, 33608, 42010, 59480, 63941, 67216, 84020, 118960, 127882, 168040, 180643, 255764, 319705, 336080, 361286, 511528, 639410, 722572, 903215, 1023056, 1278820, 1445144, 1806430, 2557640, 2890288, 3612860, 5115280, 6246887, 7225720, 12493774, 14451440, 24987548, 31234435, 49975096, 62468870, 99950192, 124937740, 249875480, 268616141, 499750960, 537232282, 1074464564, 1343080705, 2148929128, 2686161410, 4297858256, 5372322820, 10744645640, 21489291280]

約数ペア:

[(1, 21489291280), (2, 10744645640), (4, 5372322820), (5, 4297858256), (8, 2686161410), (10, 2148929128), (16, 1343080705), (20, 1074464564), (40, 537232282), (43, 499750960), (80, 268616141), (86, 249875480), (172, 124937740), (215, 99950192), (344, 62468870), (430, 49975096), (688, 31234435), (860, 24987548), (1487, 14451440), (1720, 12493774), (2974, 7225720), (3440, 6246887), (4201, 5115280), (5948, 3612860), (7435, 2890288), (8402, 2557640), (11896, 1806430), (14870, 1445144), (16804, 1278820), (21005, 1023056), (23792, 903215), (29740, 722572), (33608, 639410), (42010, 511528), (59480, 361286), (63941, 336080), (67216, 319705), (84020, 255764), (118960, 180643), (127882, 168040)]