21772665

素因数分解:

$3^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{179}}^1$

素因数の和:263

約数の個数: 64

約数和(自身を含む): 41990400

約数和(自身を除く): 20217735

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 53, 85, 135, 153, 159, 179, 255, 265, 459, 477, 537, 765, 795, 895, 901, 1431, 1611, 2295, 2385, 2685, 2703, 3043, 4505, 4833, 7155, 8055, 8109, 9129, 9487, 13515, 15215, 24165, 24327, 27387, 28461, 40545, 45645, 47435, 82161, 85383, 121635, 136935, 142305, 161279, 256149, 410805, 426915, 483837, 806395, 1280745, 1451511, 2419185, 4354533, 7257555, 21772665]

約数ペア:

[(1, 21772665), (3, 7257555), (5, 4354533), (9, 2419185), (15, 1451511), (17, 1280745), (27, 806395), (45, 483837), (51, 426915), (53, 410805), (85, 256149), (135, 161279), (153, 142305), (159, 136935), (179, 121635), (255, 85383), (265, 82161), (459, 47435), (477, 45645), (537, 40545), (765, 28461), (795, 27387), (895, 24327), (901, 24165), (1431, 15215), (1611, 13515), (2295, 9487), (2385, 9129), (2685, 8109), (2703, 8055), (3043, 7155), (4505, 4833)]