21519120

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{12809}}^1$

素因数の和:12832

約数の個数: 80

約数和(自身を含む): 76245120

約数和(自身を除く): 54726000

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 80, 84, 105, 112, 120, 140, 168, 210, 240, 280, 336, 420, 560, 840, 1680, 12809, 25618, 38427, 51236, 64045, 76854, 89663, 102472, 128090, 153708, 179326, 192135, 204944, 256180, 268989, 307416, 358652, 384270, 448315, 512360, 537978, 614832, 717304, 768540, 896630, 1024720, 1075956, 1344945, 1434608, 1537080, 1793260, 2151912, 2689890, 3074160, 3586520, 4303824, 5379780, 7173040, 10759560, 21519120]

約数ペア:

[(1, 21519120), (2, 10759560), (3, 7173040), (4, 5379780), (5, 4303824), (6, 3586520), (7, 3074160), (8, 2689890), (10, 2151912), (12, 1793260), (14, 1537080), (15, 1434608), (16, 1344945), (20, 1075956), (21, 1024720), (24, 896630), (28, 768540), (30, 717304), (35, 614832), (40, 537978), (42, 512360), (48, 448315), (56, 384270), (60, 358652), (70, 307416), (80, 268989), (84, 256180), (105, 204944), (112, 192135), (120, 179326), (140, 153708), (168, 128090), (210, 102472), (240, 89663), (280, 76854), (336, 64045), (420, 51236), (560, 38427), (840, 25618), (1680, 12809)]