21409720

素因数分解:

$2^3\times 5^1\times {\mathrm{535243}}^1$

素因数の和:535254

約数の個数: 16

約数和(自身を含む): 48171960

約数和(自身を除く): 26762240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 535243, 1070486, 2140972, 2676215, 4281944, 5352430, 10704860, 21409720]

約数ペア:

[(1, 21409720), (2, 10704860), (4, 5352430), (5, 4281944), (8, 2676215), (10, 2140972), (20, 1070486), (40, 535243)]