81458320

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{53591}}^1$

素因数の和:53623

約数の個数: 40

約数和(自身を含む): 199362240

約数和(自身を除く): 117903920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 53591, 107182, 214364, 267955, 428728, 535910, 857456, 1018229, 1071820, 2036458, 2143640, 4072916, 4287280, 5091145, 8145832, 10182290, 16291664, 20364580, 40729160, 81458320]

約数ペア:

[(1, 81458320), (2, 40729160), (4, 20364580), (5, 16291664), (8, 10182290), (10, 8145832), (16, 5091145), (19, 4287280), (20, 4072916), (38, 2143640), (40, 2036458), (76, 1071820), (80, 1018229), (95, 857456), (152, 535910), (190, 428728), (304, 267955), (380, 214364), (760, 107182), (1520, 53591)]