21853755

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1$

素因数の和:106

約数の個数: 144

約数和(自身を含む): 51858144

約数和(自身を除く): 30004389

約数列:

[1, 3, 5, 7, 9, 11, 15, 17, 21, 33, 35, 45, 49, 51, 53, 55, 63, 77, 85, 99, 105, 119, 147, 153, 159, 165, 187, 231, 245, 255, 265, 315, 357, 371, 385, 441, 477, 495, 539, 561, 583, 595, 693, 735, 765, 795, 833, 901, 935, 1071, 1113, 1155, 1309, 1617, 1683, 1749, 1785, 1855, 2205, 2385, 2499, 2597, 2695, 2703, 2805, 2915, 3339, 3465, 3927, 4081, 4165, 4505, 4851, 5247, 5355, 5565, 6307, 6545, 7497, 7791, 8085, 8109, 8415, 8745, 9163, 9911, 11781, 12243, 12495, 12985, 13515, 16695, 18921, 19635, 20405, 23373, 24255, 26235, 27489, 28567, 29733, 31535, 36729, 37485, 38955, 40545, 44149, 45815, 49555, 56763, 58905, 61215, 69377, 82467, 85701, 89199, 94605, 116865, 132447, 137445, 142835, 148665, 183645, 208131, 220745, 257103, 283815, 346885, 397341, 412335, 428505, 445995, 485639, 624393, 662235, 1040655, 1285515, 1456917, 1986705, 2428195, 3121965, 4370751, 7284585, 21853755]

約数ペア:

[(1, 21853755), (3, 7284585), (5, 4370751), (7, 3121965), (9, 2428195), (11, 1986705), (15, 1456917), (17, 1285515), (21, 1040655), (33, 662235), (35, 624393), (45, 485639), (49, 445995), (51, 428505), (53, 412335), (55, 397341), (63, 346885), (77, 283815), (85, 257103), (99, 220745), (105, 208131), (119, 183645), (147, 148665), (153, 142835), (159, 137445), (165, 132447), (187, 116865), (231, 94605), (245, 89199), (255, 85701), (265, 82467), (315, 69377), (357, 61215), (371, 58905), (385, 56763), (441, 49555), (477, 45815), (495, 44149), (539, 40545), (561, 38955), (583, 37485), (595, 36729), (693, 31535), (735, 29733), (765, 28567), (795, 27489), (833, 26235), (901, 24255), (935, 23373), (1071, 20405), (1113, 19635), (1155, 18921), (1309, 16695), (1617, 13515), (1683, 12985), (1749, 12495), (1785, 12243), (1855, 11781), (2205, 9911), (2385, 9163), (2499, 8745), (2597, 8415), (2695, 8109), (2703, 8085), (2805, 7791), (2915, 7497), (3339, 6545), (3465, 6307), (3927, 5565), (4081, 5355), (4165, 5247), (4505, 4851)]