20798720

素因数分解:

$2^8\times 5^1\times {\mathrm{16249}}^1$

素因数の和:16270

約数の個数: 36

約数和(自身を含む): 49822500

約数和(自身を除く): 29023780

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 16249, 32498, 64996, 81245, 129992, 162490, 259984, 324980, 519968, 649960, 1039936, 1299920, 2079872, 2599840, 4159744, 5199680, 10399360, 20798720]

約数ペア:

[(1, 20798720), (2, 10399360), (4, 5199680), (5, 4159744), (8, 2599840), (10, 2079872), (16, 1299920), (20, 1039936), (32, 649960), (40, 519968), (64, 324980), (80, 259984), (128, 162490), (160, 129992), (256, 81245), (320, 64996), (640, 32498), (1280, 16249)]