81981040

素因数分解:

$2^4\times 5^1\times {\mathrm{127}}^1\times {\mathrm{8069}}^1$

素因数の和:8209

約数の個数: 40

約数和(自身を含む): 192130560

約数和(自身を除く): 110149520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 127, 254, 508, 635, 1016, 1270, 2032, 2540, 5080, 8069, 10160, 16138, 32276, 40345, 64552, 80690, 129104, 161380, 322760, 645520, 1024763, 2049526, 4099052, 5123815, 8198104, 10247630, 16396208, 20495260, 40990520, 81981040]

約数ペア:

[(1, 81981040), (2, 40990520), (4, 20495260), (5, 16396208), (8, 10247630), (10, 8198104), (16, 5123815), (20, 4099052), (40, 2049526), (80, 1024763), (127, 645520), (254, 322760), (508, 161380), (635, 129104), (1016, 80690), (1270, 64552), (2032, 40345), (2540, 32276), (5080, 16138), (8069, 10160)]