20978560

素因数分解:

$2^7\times 5^1\times {\mathrm{32779}}^1$

素因数の和:32798

約数の個数: 32

約数和(自身を含む): 50153400

約数和(自身を除く): 29174840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 32779, 65558, 131116, 163895, 262232, 327790, 524464, 655580, 1048928, 1311160, 2097856, 2622320, 4195712, 5244640, 10489280, 20978560]

約数ペア:

[(1, 20978560), (2, 10489280), (4, 5244640), (5, 4195712), (8, 2622320), (10, 2097856), (16, 1311160), (20, 1048928), (32, 655580), (40, 524464), (64, 327790), (80, 262232), (128, 163895), (160, 131116), (320, 65558), (640, 32779)]