21011840

素因数分解:

$2^7\times 5^1\times {\mathrm{32831}}^1$

素因数の和:32850

約数の個数: 32

約数和(自身を含む): 50232960

約数和(自身を除く): 29221120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 32831, 65662, 131324, 164155, 262648, 328310, 525296, 656620, 1050592, 1313240, 2101184, 2626480, 4202368, 5252960, 10505920, 21011840]

約数ペア:

[(1, 21011840), (2, 10505920), (4, 5252960), (5, 4202368), (8, 2626480), (10, 2101184), (16, 1313240), (20, 1050592), (32, 656620), (40, 525296), (64, 328310), (80, 262648), (128, 164155), (160, 131324), (320, 65662), (640, 32831)]