21971376

素因数分解:

$2^4\times 3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{307}}^1$

素因数の和:399

約数の個数: 120

約数和(自身を含む): 71495424

約数和(自身を除く): 49524048

約数列:

[1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 16, 18, 21, 24, 28, 36, 42, 48, 56, 63, 71, 72, 84, 112, 126, 142, 144, 168, 213, 252, 284, 307, 336, 426, 497, 504, 568, 614, 639, 852, 921, 994, 1008, 1136, 1228, 1278, 1491, 1704, 1842, 1988, 2149, 2456, 2556, 2763, 2982, 3408, 3684, 3976, 4298, 4473, 4912, 5112, 5526, 5964, 6447, 7368, 7952, 8596, 8946, 10224, 11052, 11928, 12894, 14736, 17192, 17892, 19341, 21797, 22104, 23856, 25788, 34384, 35784, 38682, 43594, 44208, 51576, 65391, 71568, 77364, 87188, 103152, 130782, 152579, 154728, 174376, 196173, 261564, 305158, 309456, 348752, 392346, 457737, 523128, 610316, 784692, 915474, 1046256, 1220632, 1373211, 1569384, 1830948, 2441264, 2746422, 3138768, 3661896, 5492844, 7323792, 10985688, 21971376]

約数ペア:

[(1, 21971376), (2, 10985688), (3, 7323792), (4, 5492844), (6, 3661896), (7, 3138768), (8, 2746422), (9, 2441264), (12, 1830948), (14, 1569384), (16, 1373211), (18, 1220632), (21, 1046256), (24, 915474), (28, 784692), (36, 610316), (42, 523128), (48, 457737), (56, 392346), (63, 348752), (71, 309456), (72, 305158), (84, 261564), (112, 196173), (126, 174376), (142, 154728), (144, 152579), (168, 130782), (213, 103152), (252, 87188), (284, 77364), (307, 71568), (336, 65391), (426, 51576), (497, 44208), (504, 43594), (568, 38682), (614, 35784), (639, 34384), (852, 25788), (921, 23856), (994, 22104), (1008, 21797), (1136, 19341), (1228, 17892), (1278, 17192), (1491, 14736), (1704, 12894), (1842, 11928), (1988, 11052), (2149, 10224), (2456, 8946), (2556, 8596), (2763, 7952), (2982, 7368), (3408, 6447), (3684, 5964), (3976, 5526), (4298, 5112), (4473, 4912)]