81171460

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{57163}}^1$

素因数の和:57243

約数の個数: 24

約数和(自身を含む): 172863936

約数和(自身を除く): 91692476

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 57163, 114326, 228652, 285815, 571630, 1143260, 4058573, 8117146, 16234292, 20292865, 40585730, 81171460]

約数ペア:

[(1, 81171460), (2, 40585730), (4, 20292865), (5, 16234292), (10, 8117146), (20, 4058573), (71, 1143260), (142, 571630), (284, 285815), (355, 228652), (710, 114326), (1420, 57163)]