21985425

素因数分解:

$3^5\times 5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1$

素因数の和:90

約数の個数: 144

約数和(自身を含む): 51996672

約数和(自身を除く): 30011247

約数列:

[1, 3, 5, 7, 9, 11, 15, 21, 25, 27, 33, 35, 45, 47, 55, 63, 75, 77, 81, 99, 105, 135, 141, 165, 175, 189, 225, 231, 235, 243, 275, 297, 315, 329, 385, 405, 423, 495, 517, 525, 567, 675, 693, 705, 825, 891, 945, 987, 1155, 1175, 1215, 1269, 1485, 1551, 1575, 1645, 1701, 1925, 2025, 2079, 2115, 2475, 2585, 2673, 2835, 2961, 3465, 3525, 3619, 3807, 4455, 4653, 4725, 4935, 5775, 6075, 6237, 6345, 7425, 7755, 8225, 8505, 8883, 10395, 10575, 10857, 11421, 12925, 13365, 13959, 14175, 14805, 17325, 18095, 18711, 19035, 22275, 23265, 24675, 26649, 31185, 31725, 32571, 38775, 41877, 42525, 44415, 51975, 54285, 57105, 66825, 69795, 74025, 79947, 90475, 93555, 95175, 97713, 116325, 125631, 133245, 155925, 162855, 209385, 222075, 271425, 285525, 293139, 348975, 399735, 467775, 488565, 628155, 666225, 814275, 879417, 1046925, 1465695, 1998675, 2442825, 3140775, 4397085, 7328475, 21985425]

約数ペア:

[(1, 21985425), (3, 7328475), (5, 4397085), (7, 3140775), (9, 2442825), (11, 1998675), (15, 1465695), (21, 1046925), (25, 879417), (27, 814275), (33, 666225), (35, 628155), (45, 488565), (47, 467775), (55, 399735), (63, 348975), (75, 293139), (77, 285525), (81, 271425), (99, 222075), (105, 209385), (135, 162855), (141, 155925), (165, 133245), (175, 125631), (189, 116325), (225, 97713), (231, 95175), (235, 93555), (243, 90475), (275, 79947), (297, 74025), (315, 69795), (329, 66825), (385, 57105), (405, 54285), (423, 51975), (495, 44415), (517, 42525), (525, 41877), (567, 38775), (675, 32571), (693, 31725), (705, 31185), (825, 26649), (891, 24675), (945, 23265), (987, 22275), (1155, 19035), (1175, 18711), (1215, 18095), (1269, 17325), (1485, 14805), (1551, 14175), (1575, 13959), (1645, 13365), (1701, 12925), (1925, 11421), (2025, 10857), (2079, 10575), (2115, 10395), (2475, 8883), (2585, 8505), (2673, 8225), (2835, 7755), (2961, 7425), (3465, 6345), (3525, 6237), (3619, 6075), (3807, 5775), (4455, 4935), (4653, 4725)]