21000479535

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{221489}}^1$

素因数の和:221557

約数の個数: 72

約数和(自身を含む): 43328759760

約数和(自身を除く): 22328280225

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 43, 45, 49, 63, 105, 129, 147, 215, 245, 301, 315, 387, 441, 645, 735, 903, 1505, 1935, 2107, 2205, 2709, 4515, 6321, 10535, 13545, 18963, 31605, 94815, 221489, 664467, 1107445, 1550423, 1993401, 3322335, 4651269, 7752115, 9524027, 9967005, 10852961, 13953807, 23256345, 28572081, 32558883, 47620135, 54264805, 66668189, 69769035, 85716243, 97676649, 142860405, 162794415, 200004567, 333340945, 428581215, 466677323, 488383245, 600013701, 1000022835, 1400031969, 2333386615, 3000068505, 4200095907, 7000159845, 21000479535]

約数ペア:

[(1, 21000479535), (3, 7000159845), (5, 4200095907), (7, 3000068505), (9, 2333386615), (15, 1400031969), (21, 1000022835), (35, 600013701), (43, 488383245), (45, 466677323), (49, 428581215), (63, 333340945), (105, 200004567), (129, 162794415), (147, 142860405), (215, 97676649), (245, 85716243), (301, 69769035), (315, 66668189), (387, 54264805), (441, 47620135), (645, 32558883), (735, 28572081), (903, 23256345), (1505, 13953807), (1935, 10852961), (2107, 9967005), (2205, 9524027), (2709, 7752115), (4515, 4651269), (6321, 3322335), (10535, 1993401), (13545, 1550423), (18963, 1107445), (31605, 664467), (94815, 221489)]