21287475

素因数分解:

$3^3\times 5^2\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1$

素因数の和:138

約数の個数: 96

約数和(自身を含む): 44282880

約数和(自身を除く): 22995405

約数列:

[1, 3, 5, 9, 11, 15, 25, 27, 33, 45, 47, 55, 61, 75, 99, 135, 141, 165, 183, 225, 235, 275, 297, 305, 423, 495, 517, 549, 671, 675, 705, 825, 915, 1175, 1269, 1485, 1525, 1551, 1647, 2013, 2115, 2475, 2585, 2745, 2867, 3355, 3525, 4575, 4653, 6039, 6345, 7425, 7755, 8235, 8601, 10065, 10575, 12925, 13725, 13959, 14335, 16775, 18117, 23265, 25803, 30195, 31537, 31725, 38775, 41175, 43005, 50325, 69795, 71675, 77409, 90585, 94611, 116325, 129015, 150975, 157685, 215025, 283833, 348975, 387045, 452925, 473055, 645075, 788425, 851499, 1419165, 1935225, 2365275, 4257495, 7095825, 21287475]

約数ペア:

[(1, 21287475), (3, 7095825), (5, 4257495), (9, 2365275), (11, 1935225), (15, 1419165), (25, 851499), (27, 788425), (33, 645075), (45, 473055), (47, 452925), (55, 387045), (61, 348975), (75, 283833), (99, 215025), (135, 157685), (141, 150975), (165, 129015), (183, 116325), (225, 94611), (235, 90585), (275, 77409), (297, 71675), (305, 69795), (423, 50325), (495, 43005), (517, 41175), (549, 38775), (671, 31725), (675, 31537), (705, 30195), (825, 25803), (915, 23265), (1175, 18117), (1269, 16775), (1485, 14335), (1525, 13959), (1551, 13725), (1647, 12925), (2013, 10575), (2115, 10065), (2475, 8601), (2585, 8235), (2745, 7755), (2867, 7425), (3355, 6345), (3525, 6039), (4575, 4653)]