19909040

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{14639}}^1$

素因数の和:14669

約数の個数: 40

約数和(自身を含む): 49014720

約数和(自身を除く): 29105680

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 14639, 29278, 58556, 73195, 117112, 146390, 234224, 248863, 292780, 497726, 585560, 995452, 1171120, 1244315, 1990904, 2488630, 3981808, 4977260, 9954520, 19909040]

約数ペア:

[(1, 19909040), (2, 9954520), (4, 4977260), (5, 3981808), (8, 2488630), (10, 1990904), (16, 1244315), (17, 1171120), (20, 995452), (34, 585560), (40, 497726), (68, 292780), (80, 248863), (85, 234224), (136, 146390), (170, 117112), (272, 73195), (340, 58556), (680, 29278), (1360, 14639)]