18840016

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{1709}}^1$

素因数の和:1783

約数の個数: 40

約数和(自身を含む): 40075560

約数和(自身を除く): 21235544

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 53, 104, 106, 208, 212, 424, 689, 848, 1378, 1709, 2756, 3418, 5512, 6836, 11024, 13672, 22217, 27344, 44434, 88868, 90577, 177736, 181154, 355472, 362308, 724616, 1177501, 1449232, 2355002, 4710004, 9420008, 18840016]

約数ペア:

[(1, 18840016), (2, 9420008), (4, 4710004), (8, 2355002), (13, 1449232), (16, 1177501), (26, 724616), (52, 362308), (53, 355472), (104, 181154), (106, 177736), (208, 90577), (212, 88868), (424, 44434), (689, 27344), (848, 22217), (1378, 13672), (1709, 11024), (2756, 6836), (3418, 5512)]