19990646

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1\times {\mathrm{163}}^1$

素因数の和:320

約数の個数: 32

約数和(自身を含む): 33475680

約数和(自身を除く): 13485034

約数列:

[1, 2, 13, 26, 53, 89, 106, 163, 178, 326, 689, 1157, 1378, 2119, 2314, 4238, 4717, 8639, 9434, 14507, 17278, 29014, 61321, 112307, 122642, 188591, 224614, 377182, 768871, 1537742, 9995323, 19990646]

約数ペア:

[(1, 19990646), (2, 9995323), (13, 1537742), (26, 768871), (53, 377182), (89, 224614), (106, 188591), (163, 122642), (178, 112307), (326, 61321), (689, 29014), (1157, 17278), (1378, 14507), (2119, 9434), (2314, 8639), (4238, 4717)]