21153825

素因数分解:

$3^3\times 5^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{37}}^1$

素因数の和:85

約数の個数: 144

約数和(自身を含む): 50135680

約数和(自身を除く): 28981855

約数列:

[1, 3, 5, 7, 9, 11, 15, 21, 25, 27, 33, 35, 37, 45, 55, 63, 75, 77, 99, 105, 111, 121, 135, 165, 175, 185, 189, 225, 231, 259, 275, 297, 315, 333, 363, 385, 407, 495, 525, 555, 605, 675, 693, 777, 825, 847, 925, 945, 999, 1089, 1155, 1221, 1295, 1485, 1575, 1665, 1815, 1925, 2035, 2079, 2331, 2475, 2541, 2775, 2849, 3025, 3267, 3465, 3663, 3885, 4235, 4477, 4725, 4995, 5445, 5775, 6105, 6475, 6993, 7425, 7623, 8325, 8547, 9075, 10175, 10395, 10989, 11655, 12705, 13431, 14245, 16335, 17325, 18315, 19425, 21175, 22385, 22869, 24975, 25641, 27225, 30525, 31339, 34965, 38115, 40293, 42735, 51975, 54945, 58275, 63525, 67155, 71225, 76923, 81675, 91575, 94017, 111925, 114345, 120879, 128205, 156695, 174825, 190575, 201465, 213675, 274725, 282051, 335775, 384615, 470085, 571725, 604395, 641025, 783475, 846153, 1007325, 1410255, 1923075, 2350425, 3021975, 4230765, 7051275, 21153825]

約数ペア:

[(1, 21153825), (3, 7051275), (5, 4230765), (7, 3021975), (9, 2350425), (11, 1923075), (15, 1410255), (21, 1007325), (25, 846153), (27, 783475), (33, 641025), (35, 604395), (37, 571725), (45, 470085), (55, 384615), (63, 335775), (75, 282051), (77, 274725), (99, 213675), (105, 201465), (111, 190575), (121, 174825), (135, 156695), (165, 128205), (175, 120879), (185, 114345), (189, 111925), (225, 94017), (231, 91575), (259, 81675), (275, 76923), (297, 71225), (315, 67155), (333, 63525), (363, 58275), (385, 54945), (407, 51975), (495, 42735), (525, 40293), (555, 38115), (605, 34965), (675, 31339), (693, 30525), (777, 27225), (825, 25641), (847, 24975), (925, 22869), (945, 22385), (999, 21175), (1089, 19425), (1155, 18315), (1221, 17325), (1295, 16335), (1485, 14245), (1575, 13431), (1665, 12705), (1815, 11655), (1925, 10989), (2035, 10395), (2079, 10175), (2331, 9075), (2475, 8547), (2541, 8325), (2775, 7623), (2849, 7425), (3025, 6993), (3267, 6475), (3465, 6105), (3663, 5775), (3885, 5445), (4235, 4995), (4477, 4725)]