28291725

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1$

素因数の和:128

約数の個数: 144

約数和(自身を含む): 66852864

約数和(自身を除く): 38561139

約数列:

[1, 3, 5, 7, 9, 11, 15, 21, 23, 25, 33, 35, 45, 55, 63, 69, 71, 75, 77, 99, 105, 115, 161, 165, 175, 207, 213, 225, 231, 253, 275, 315, 345, 355, 385, 483, 495, 497, 525, 575, 639, 693, 759, 781, 805, 825, 1035, 1065, 1155, 1265, 1449, 1491, 1575, 1633, 1725, 1771, 1775, 1925, 2277, 2343, 2415, 2475, 2485, 3195, 3465, 3795, 3905, 4025, 4473, 4899, 5175, 5313, 5325, 5467, 5775, 6325, 7029, 7245, 7455, 8165, 8855, 11385, 11431, 11715, 12075, 12425, 14697, 15939, 15975, 16401, 17325, 17963, 18975, 19525, 22365, 24495, 26565, 27335, 34293, 35145, 36225, 37275, 40825, 44275, 49203, 53889, 56925, 57155, 58575, 73485, 79695, 82005, 89815, 102879, 111825, 122475, 125741, 132825, 136675, 161667, 171465, 175725, 246015, 269445, 285775, 367425, 377223, 398475, 410025, 449075, 514395, 628705, 808335, 857325, 1131669, 1230075, 1347225, 1886115, 2571975, 3143525, 4041675, 5658345, 9430575, 28291725]

約数ペア:

[(1, 28291725), (3, 9430575), (5, 5658345), (7, 4041675), (9, 3143525), (11, 2571975), (15, 1886115), (21, 1347225), (23, 1230075), (25, 1131669), (33, 857325), (35, 808335), (45, 628705), (55, 514395), (63, 449075), (69, 410025), (71, 398475), (75, 377223), (77, 367425), (99, 285775), (105, 269445), (115, 246015), (161, 175725), (165, 171465), (175, 161667), (207, 136675), (213, 132825), (225, 125741), (231, 122475), (253, 111825), (275, 102879), (315, 89815), (345, 82005), (355, 79695), (385, 73485), (483, 58575), (495, 57155), (497, 56925), (525, 53889), (575, 49203), (639, 44275), (693, 40825), (759, 37275), (781, 36225), (805, 35145), (825, 34293), (1035, 27335), (1065, 26565), (1155, 24495), (1265, 22365), (1449, 19525), (1491, 18975), (1575, 17963), (1633, 17325), (1725, 16401), (1771, 15975), (1775, 15939), (1925, 14697), (2277, 12425), (2343, 12075), (2415, 11715), (2475, 11431), (2485, 11385), (3195, 8855), (3465, 8165), (3795, 7455), (3905, 7245), (4025, 7029), (4473, 6325), (4899, 5775), (5175, 5467), (5313, 5325)]