21000398512

素因数分解:

$2^4\times {\mathrm{263}}^1\times {\mathrm{4990589}}^1$

素因数の和:4990860

約数の個数: 20

約数和(自身を含む): 40842988560

約数和(自身を除く): 19842590048

約数列:

[1, 2, 4, 8, 16, 263, 526, 1052, 2104, 4208, 4990589, 9981178, 19962356, 39924712, 79849424, 1312524907, 2625049814, 5250099628, 10500199256, 21000398512]

約数ペア:

[(1, 21000398512), (2, 10500199256), (4, 5250099628), (8, 2625049814), (16, 1312524907), (263, 79849424), (526, 39924712), (1052, 19962356), (2104, 9981178), (4208, 4990589)]