21999285

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{907}}^1$

素因数の和:943

約数の個数: 72

約数和(自身を含む): 48443616

約数和(自身を除く): 26444331

約数列:

[1, 3, 5, 7, 9, 11, 15, 21, 33, 35, 45, 49, 55, 63, 77, 99, 105, 147, 165, 231, 245, 315, 385, 441, 495, 539, 693, 735, 907, 1155, 1617, 2205, 2695, 2721, 3465, 4535, 4851, 6349, 8085, 8163, 9977, 13605, 19047, 24255, 29931, 31745, 40815, 44443, 49885, 57141, 69839, 89793, 95235, 133329, 149655, 209517, 222215, 285705, 349195, 399987, 448965, 488873, 628551, 666645, 1047585, 1466619, 1999935, 2444365, 3142755, 4399857, 7333095, 21999285]

約数ペア:

[(1, 21999285), (3, 7333095), (5, 4399857), (7, 3142755), (9, 2444365), (11, 1999935), (15, 1466619), (21, 1047585), (33, 666645), (35, 628551), (45, 488873), (49, 448965), (55, 399987), (63, 349195), (77, 285705), (99, 222215), (105, 209517), (147, 149655), (165, 133329), (231, 95235), (245, 89793), (315, 69839), (385, 57141), (441, 49885), (495, 44443), (539, 40815), (693, 31745), (735, 29931), (907, 24255), (1155, 19047), (1617, 13605), (2205, 9977), (2695, 8163), (2721, 8085), (3465, 6349), (4535, 4851)]