21004728

素因数分解:

$2^3\times 3^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{631}}^1$

素因数の和:732

約数の個数: 64

約数和(自身を含む): 56121600

約数和(自身を除く): 35116872

約数列:

[1, 2, 3, 4, 6, 8, 12, 19, 24, 38, 57, 73, 76, 114, 146, 152, 219, 228, 292, 438, 456, 584, 631, 876, 1262, 1387, 1752, 1893, 2524, 2774, 3786, 4161, 5048, 5548, 7572, 8322, 11096, 11989, 15144, 16644, 23978, 33288, 35967, 46063, 47956, 71934, 92126, 95912, 138189, 143868, 184252, 276378, 287736, 368504, 552756, 875197, 1105512, 1750394, 2625591, 3500788, 5251182, 7001576, 10502364, 21004728]

約数ペア:

[(1, 21004728), (2, 10502364), (3, 7001576), (4, 5251182), (6, 3500788), (8, 2625591), (12, 1750394), (19, 1105512), (24, 875197), (38, 552756), (57, 368504), (73, 287736), (76, 276378), (114, 184252), (146, 143868), (152, 138189), (219, 95912), (228, 92126), (292, 71934), (438, 47956), (456, 46063), (584, 35967), (631, 33288), (876, 23978), (1262, 16644), (1387, 15144), (1752, 11989), (1893, 11096), (2524, 8322), (2774, 7572), (3786, 5548), (4161, 5048)]