640328715

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^2\times {\mathrm{67}}^1$

素因数の和:170

約数の個数: 144

約数和(自身を含む): 1327251744

約数和(自身を除く): 686923029

約数列:

[1, 3, 5, 9, 13, 15, 17, 31, 39, 45, 51, 65, 67, 85, 93, 117, 153, 155, 195, 201, 221, 255, 279, 335, 403, 465, 527, 585, 603, 663, 765, 871, 961, 1005, 1105, 1139, 1209, 1395, 1581, 1989, 2015, 2077, 2613, 2635, 2883, 3015, 3315, 3417, 3627, 4355, 4743, 4805, 5695, 6045, 6231, 6851, 7839, 7905, 8649, 9945, 10251, 10385, 12493, 13065, 14415, 14807, 16337, 17085, 18135, 18693, 20553, 23715, 27001, 31155, 34255, 35309, 37479, 39195, 43245, 44421, 49011, 51255, 61659, 62465, 64387, 74035, 81003, 81685, 93465, 102765, 105927, 112437, 133263, 135005, 147033, 176545, 187395, 193161, 212381, 222105, 243009, 245055, 308295, 317781, 321935, 405015, 459017, 529635, 562185, 579483, 637143, 666315, 735165, 837031, 965805, 1061905, 1094579, 1215045, 1377051, 1588905, 1911429, 2295085, 2511093, 2897415, 3185715, 3283737, 4131153, 4185155, 5472895, 6885255, 7533279, 9557145, 9851211, 12555465, 14229527, 16418685, 20655765, 37666395, 42688581, 49256055, 71147635, 128065743, 213442905, 640328715]

約数ペア:

[(1, 640328715), (3, 213442905), (5, 128065743), (9, 71147635), (13, 49256055), (15, 42688581), (17, 37666395), (31, 20655765), (39, 16418685), (45, 14229527), (51, 12555465), (65, 9851211), (67, 9557145), (85, 7533279), (93, 6885255), (117, 5472895), (153, 4185155), (155, 4131153), (195, 3283737), (201, 3185715), (221, 2897415), (255, 2511093), (279, 2295085), (335, 1911429), (403, 1588905), (465, 1377051), (527, 1215045), (585, 1094579), (603, 1061905), (663, 965805), (765, 837031), (871, 735165), (961, 666315), (1005, 637143), (1105, 579483), (1139, 562185), (1209, 529635), (1395, 459017), (1581, 405015), (1989, 321935), (2015, 317781), (2077, 308295), (2613, 245055), (2635, 243009), (2883, 222105), (3015, 212381), (3315, 193161), (3417, 187395), (3627, 176545), (4355, 147033), (4743, 135005), (4805, 133263), (5695, 112437), (6045, 105927), (6231, 102765), (6851, 93465), (7839, 81685), (7905, 81003), (8649, 74035), (9945, 64387), (10251, 62465), (10385, 61659), (12493, 51255), (13065, 49011), (14415, 44421), (14807, 43245), (16337, 39195), (17085, 37479), (18135, 35309), (18693, 34255), (20553, 31155), (23715, 27001)]