20740840

素因数分解:

$2^3\times 5^1\times {\mathrm{518521}}^1$

素因数の和:518532

約数の個数: 16

約数和(自身を含む): 46666980

約数和(自身を除く): 25926140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 518521, 1037042, 2074084, 2592605, 4148168, 5185210, 10370420, 20740840]

約数ペア:

[(1, 20740840), (2, 10370420), (4, 5185210), (5, 4148168), (8, 2592605), (10, 2074084), (20, 1037042), (40, 518521)]