20782720

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{4639}}^1$

素因数の和:4665

約数の個数: 64

約数和(自身を含む): 56793600

約数和(自身を除く): 36010880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 80, 112, 128, 140, 160, 224, 280, 320, 448, 560, 640, 896, 1120, 2240, 4480, 4639, 9278, 18556, 23195, 32473, 37112, 46390, 64946, 74224, 92780, 129892, 148448, 162365, 185560, 259784, 296896, 324730, 371120, 519568, 593792, 649460, 742240, 1039136, 1298920, 1484480, 2078272, 2597840, 2968960, 4156544, 5195680, 10391360, 20782720]

約数ペア:

[(1, 20782720), (2, 10391360), (4, 5195680), (5, 4156544), (7, 2968960), (8, 2597840), (10, 2078272), (14, 1484480), (16, 1298920), (20, 1039136), (28, 742240), (32, 649460), (35, 593792), (40, 519568), (56, 371120), (64, 324730), (70, 296896), (80, 259784), (112, 185560), (128, 162365), (140, 148448), (160, 129892), (224, 92780), (280, 74224), (320, 64946), (448, 46390), (560, 37112), (640, 32473), (896, 23195), (1120, 18556), (2240, 9278), (4480, 4639)]