21288816

素因数分解:

$2^4\times 3^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{251}}^1$

素因数の和:315

約数の個数: 120

約数和(自身を含む): 64995840

約数和(自身を除く): 43707024

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 19, 24, 31, 36, 38, 48, 57, 62, 72, 76, 93, 114, 124, 144, 152, 171, 186, 228, 248, 251, 279, 304, 342, 372, 456, 496, 502, 558, 589, 684, 744, 753, 912, 1004, 1116, 1178, 1368, 1488, 1506, 1767, 2008, 2232, 2259, 2356, 2736, 3012, 3534, 4016, 4464, 4518, 4712, 4769, 5301, 6024, 7068, 7781, 9036, 9424, 9538, 10602, 12048, 14136, 14307, 15562, 18072, 19076, 21204, 23343, 28272, 28614, 31124, 36144, 38152, 42408, 42921, 46686, 57228, 62248, 70029, 76304, 84816, 85842, 93372, 114456, 124496, 140058, 147839, 171684, 186744, 228912, 280116, 295678, 343368, 373488, 443517, 560232, 591356, 686736, 887034, 1120464, 1182712, 1330551, 1774068, 2365424, 2661102, 3548136, 5322204, 7096272, 10644408, 21288816]

約数ペア:

[(1, 21288816), (2, 10644408), (3, 7096272), (4, 5322204), (6, 3548136), (8, 2661102), (9, 2365424), (12, 1774068), (16, 1330551), (18, 1182712), (19, 1120464), (24, 887034), (31, 686736), (36, 591356), (38, 560232), (48, 443517), (57, 373488), (62, 343368), (72, 295678), (76, 280116), (93, 228912), (114, 186744), (124, 171684), (144, 147839), (152, 140058), (171, 124496), (186, 114456), (228, 93372), (248, 85842), (251, 84816), (279, 76304), (304, 70029), (342, 62248), (372, 57228), (456, 46686), (496, 42921), (502, 42408), (558, 38152), (589, 36144), (684, 31124), (744, 28614), (753, 28272), (912, 23343), (1004, 21204), (1116, 19076), (1178, 18072), (1368, 15562), (1488, 14307), (1506, 14136), (1767, 12048), (2008, 10602), (2232, 9538), (2259, 9424), (2356, 9036), (2736, 7781), (3012, 7068), (3534, 6024), (4016, 5301), (4464, 4769), (4518, 4712)]