21748815

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{829}}^1$

素因数の和:904

約数の個数: 48

約数和(自身を含む): 41951520

約数和(自身を除く): 20202705

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 53, 55, 99, 159, 165, 265, 477, 495, 583, 795, 829, 1749, 2385, 2487, 2915, 4145, 5247, 7461, 8745, 9119, 12435, 26235, 27357, 37305, 43937, 45595, 82071, 131811, 136785, 219685, 395433, 410355, 483307, 659055, 1449921, 1977165, 2416535, 4349763, 7249605, 21748815]

約数ペア:

[(1, 21748815), (3, 7249605), (5, 4349763), (9, 2416535), (11, 1977165), (15, 1449921), (33, 659055), (45, 483307), (53, 410355), (55, 395433), (99, 219685), (159, 136785), (165, 131811), (265, 82071), (477, 45595), (495, 43937), (583, 37305), (795, 27357), (829, 26235), (1749, 12435), (2385, 9119), (2487, 8745), (2915, 7461), (4145, 5247)]