21059840

素因数分解:

$2^8\times 5^1\times {\mathrm{16453}}^1$

素因数の和:16474

約数の個数: 36

約数和(自身を含む): 50447964

約数和(自身を除く): 29388124

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 16453, 32906, 65812, 82265, 131624, 164530, 263248, 329060, 526496, 658120, 1052992, 1316240, 2105984, 2632480, 4211968, 5264960, 10529920, 21059840]

約数ペア:

[(1, 21059840), (2, 10529920), (4, 5264960), (5, 4211968), (8, 2632480), (10, 2105984), (16, 1316240), (20, 1052992), (32, 658120), (40, 526496), (64, 329060), (80, 263248), (128, 164530), (160, 131624), (256, 82265), (320, 65812), (640, 32906), (1280, 16453)]