20518400

素因数分解:

$2^9\times 5^2\times 7^1\times {\mathrm{229}}^1$

素因数の和:264

約数の個数: 120

約数和(自身を含む): 58351920

約数和(自身を除く): 37833520

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 32, 35, 40, 50, 56, 64, 70, 80, 100, 112, 128, 140, 160, 175, 200, 224, 229, 256, 280, 320, 350, 400, 448, 458, 512, 560, 640, 700, 800, 896, 916, 1120, 1145, 1280, 1400, 1600, 1603, 1792, 1832, 2240, 2290, 2560, 2800, 3200, 3206, 3584, 3664, 4480, 4580, 5600, 5725, 6400, 6412, 7328, 8015, 8960, 9160, 11200, 11450, 12800, 12824, 14656, 16030, 17920, 18320, 22400, 22900, 25648, 29312, 32060, 36640, 40075, 44800, 45800, 51296, 58624, 64120, 73280, 80150, 89600, 91600, 102592, 117248, 128240, 146560, 160300, 183200, 205184, 256480, 293120, 320600, 366400, 410368, 512960, 586240, 641200, 732800, 820736, 1025920, 1282400, 1465600, 2051840, 2564800, 2931200, 4103680, 5129600, 10259200, 20518400]

約数ペア:

[(1, 20518400), (2, 10259200), (4, 5129600), (5, 4103680), (7, 2931200), (8, 2564800), (10, 2051840), (14, 1465600), (16, 1282400), (20, 1025920), (25, 820736), (28, 732800), (32, 641200), (35, 586240), (40, 512960), (50, 410368), (56, 366400), (64, 320600), (70, 293120), (80, 256480), (100, 205184), (112, 183200), (128, 160300), (140, 146560), (160, 128240), (175, 117248), (200, 102592), (224, 91600), (229, 89600), (256, 80150), (280, 73280), (320, 64120), (350, 58624), (400, 51296), (448, 45800), (458, 44800), (512, 40075), (560, 36640), (640, 32060), (700, 29312), (800, 25648), (896, 22900), (916, 22400), (1120, 18320), (1145, 17920), (1280, 16030), (1400, 14656), (1600, 12824), (1603, 12800), (1792, 11450), (1832, 11200), (2240, 9160), (2290, 8960), (2560, 8015), (2800, 7328), (3200, 6412), (3206, 6400), (3584, 5725), (3664, 5600), (4480, 4580)]