21981708

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{4591}}^1$

素因数の和:4627

約数の個数: 72

約数和(自身を含む): 66859520

約数和(自身を除く): 44877812

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 19, 21, 28, 36, 38, 42, 57, 63, 76, 84, 114, 126, 133, 171, 228, 252, 266, 342, 399, 532, 684, 798, 1197, 1596, 2394, 4591, 4788, 9182, 13773, 18364, 27546, 32137, 41319, 55092, 64274, 82638, 87229, 96411, 128548, 165276, 174458, 192822, 261687, 289233, 348916, 385644, 523374, 578466, 610603, 785061, 1046748, 1156932, 1221206, 1570122, 1831809, 2442412, 3140244, 3663618, 5495427, 7327236, 10990854, 21981708]

約数ペア:

[(1, 21981708), (2, 10990854), (3, 7327236), (4, 5495427), (6, 3663618), (7, 3140244), (9, 2442412), (12, 1831809), (14, 1570122), (18, 1221206), (19, 1156932), (21, 1046748), (28, 785061), (36, 610603), (38, 578466), (42, 523374), (57, 385644), (63, 348916), (76, 289233), (84, 261687), (114, 192822), (126, 174458), (133, 165276), (171, 128548), (228, 96411), (252, 87229), (266, 82638), (342, 64274), (399, 55092), (532, 41319), (684, 32137), (798, 27546), (1197, 18364), (1596, 13773), (2394, 9182), (4591, 4788)]