21988240

素因数分解:

$2^4\times 5^1\times {\mathrm{274853}}^1$

素因数の和:274866

約数の個数: 20

約数和(自身を含む): 51122844

約数和(自身を除く): 29134604

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 274853, 549706, 1099412, 1374265, 2198824, 2748530, 4397648, 5497060, 10994120, 21988240]

約数ペア:

[(1, 21988240), (2, 10994120), (4, 5497060), (5, 4397648), (8, 2748530), (10, 2198824), (16, 1374265), (20, 1099412), (40, 549706), (80, 274853)]